Marc Darrow, MD, JD
“I had left knee meniscus surgery in March 2025. Since the operation, the pain has been greater than it was before surgery. Walking hurts, getting up from a chair hurts, and the pain continues at night. Can I get relief without another operation?”
The first thing I would want to establish is why the knee hurts now. Persistent pain after meniscus surgery does not automatically mean that another operation is necessary. It also does not tell us that an injection is the right answer.
By October 2026, an operation performed in March 2025 was approximately 19 months ago. Pain that continues to interfere with walking and sleep at that point deserves reassessment. It should not simply be attributed to the usual soreness of early surgical recovery.
Nonsurgical treatment may help, but the choice depends on whether the current problem is joint degeneration, a remaining or recurrent tear, a bone injury, weakness and limited movement, or another source of pain. The useful starting question is what is generating the symptoms—not which procedure comes next.
A caller’s experience: persistent pain and returning to police work
On the July 18, 2026 episode of Living Pain-Free, Erica described a meniscus injury sustained while working in law enforcement. She clarified during the conversation that she had undergone surgery after the injury and before receiving PRP. She reported continuing knee pain after the operation, followed by improvement after PRP treatment and a return to work.
Her account illustrates a meaningful personal outcome. It does not establish the exact procedure performed, the state of the remaining meniscus, or how much of the eventual improvement resulted from PRP, rehabilitation, time, or other factors. It should not be presented as proof that an injection regrew removed tissue.
Erica also described feeling that her body had failed because she had not recovered within the expected timeframe. Persistent pain is not a personal failure. It is a reason to reassess the knee and the demands being placed on it.
What exactly was done to the meniscus?
A meniscal repair and a partial meniscectomy are different operations. A repair attempts to preserve the torn tissue and allow it to heal. A partial meniscectomy removes a damaged portion. Patients sometimes refer to either procedure as having their meniscus “fixed.”
The distinction matters because the meniscus helps distribute load across the knee. If tissue was removed, the remaining joint may experience different mechanical demands. If the tear was repaired, healing, a recurrent tear, and the repair site may need consideration. Neither procedure guarantees that every other source of knee pain was addressed.
A review of the symptomatic post-meniscectomy knee describes a subset of patients who develop ongoing aching and intermittent swelling after tissue removal. It also emphasizes the limited evidence specifically supporting nonsurgical treatment of a meniscus-deficient knee. That is a reason to be precise about treatment claims, rather than assume that research on ordinary knee arthritis answers every postoperative question. (1)
The operative report can clarify how much tissue was removed or repaired, whether cartilage damage was present, and whether another procedure was performed. Comparing that information with the current examination is more useful than treating the word “meniscus” as a complete explanation.
When meniscus removal changes the way the knee carries weight
The meniscus is more than a pad between two bones. Its shape, attachments, and circumferential fibers help spread load across the joint. The term “hoop stress” describes how those fibers carry force around the meniscus when the knee bears weight. A tear can disrupt that function, and removing tissue can reduce it further.
A 2021 review explains that partial meniscectomy can relieve symptoms for appropriate tear patterns while also increasing contact pressures on the remaining joint surfaces. This is why preserving repairable meniscal tissue matters. It does not mean that every painful knee after surgery had too much tissue removed, or that every removed fragment could have been repaired. (2)
It is also useful to distinguish the meniscus from articular cartilage—the smooth covering on the ends of the bones. “Bone on bone” usually refers to substantial loss of joint space associated with advanced joint degeneration. It should not be taken to mean that a missing meniscus alone explains the entire condition. Meniscal function, cartilage health, alignment, and the underlying injury all influence the joint.
For a patient whose symptoms worsened after tissue removal, these mechanical changes are worth considering alongside other causes. They are an explanation to investigate, not a diagnosis established by the timing alone.
Joint-space narrowing: what the research shows
Joint-space width on a weight-bearing X-ray provides information about the space between the bones. It reflects more than one tissue and is not a direct measurement of the pain a person feels.
A 2022 Osteoarthritis Initiative study compared 144 patients who underwent partial meniscectomy with matched groups who had an untreated tear or no tear. The surgical group had faster narrowing during the first postoperative year and a greater overall loss of joint-space width through six years. Rates of further narrowing from one to six years were not significantly different among the groups. (3)
This distinction is important: the study supports concern about an early difference after surgery, rather than a claim that narrowing necessarily accelerates every year afterward. It was observational, so matching and statistical adjustment cannot remove every difference between patients who did and did not have surgery.
The findings also do not establish that joint replacement is inevitable. They help explain why pain relief from removing a torn fragment and the long-term health of the whole knee are separate questions.
Why can pain remain worse after surgery?
Several possibilities need to be considered. The original meniscal finding may have been only one part of an arthritic knee. There may be a persistent or recurrent tear, ongoing joint inflammation, limited motion, or difficulty rebuilding muscle function. Pain can also arise from tissues outside the joint or be referred from the hip or back.
Symptoms around the kneecap can become particularly noticeable when standing from a chair or using stairs. Tenderness over a tendon or bursa presents a different question from deep joint pain. Burning pain, marked sensitivity to touch, or unusual changes in skin temperature or color may warrant assessment for a nerve-related pain condition.
These possibilities can overlap. They are not diagnoses that can be established from a short description. Nor does the timing alone prove that the surgery caused the current problem. The operation, the underlying knee condition, and recovery afterward all need to be considered.
Pain at night should be assessed, not automatically labeled arthritis
Night pain can occur with arthritis, but it is not specific to arthritis. Persistent rest pain, worsening symptoms, or pain that seems disproportionate to the examination deserves a closer look.
One important alternative is a subchondral insufficiency fracture—a fracture in the bone just beneath the joint cartilage. A retrospective series documented this condition after knee arthroscopy, including meniscectomy. The study examined patients who already had the fracture; it does not establish how commonly it occurs among everyone having surgery. (4)
This matters because a bone injury may require protection from weight bearing rather than simply more strengthening or an injection. It is one reason not to encourage someone with unexplained severe pain to push through walking exercises.
A suddenly hot, swollen knee, fever, or inability to bear weight requires urgent assessment. A knee that is physically blocked from straightening also needs prompt orthopedic evaluation. New calf swelling needs medical assessment; associated chest pain or shortness of breath requires emergency care.
What can a reassessment establish?
The history should distinguish pain that never improved after surgery from pain that returned after a period of relief. A new injury, recurrent swelling, instability, and difficulty fully straightening the knee can change the clinical question.
The examination can assess tenderness, motion, swelling, stability, strength, and walking. Pain during a specific movement may help identify the structures under stress, but it is not a diagnosis by itself.
Weight-bearing X-rays may help evaluate arthritis and alignment. MRI may be appropriate when the clinician is concerned about a recurrent tear, bone injury, or another finding that could change management. A previously operated meniscus can look different on MRI, so the radiologist needs the surgical history and, when available, earlier images.
If significant fluid is present and infection or crystal disease is a concern, examination of joint fluid may be relevant. The goal is to answer a specific question, rather than order tests solely because pain has persisted.
Why MRI after meniscus surgery can be difficult to interpret
An operated meniscus does not necessarily look like an unoperated one. Removing tissue changes its contour, while repair and healing can change its signal on MRI. A line or irregularity that would be suspicious in an untreated knee may need a different interpretation after surgery.
A 2022 imaging review describes the roles of conventional MRI and MR arthrography in distinguishing an intact postoperative meniscus from a recurrent tear. MR arthrography involves contrast and may be useful in selected circumstances; it is not automatically required for everyone with continuing pain. (5)
The practical lesson is to give the imaging specialist the operative history and compare current findings with prior studies when available. The question is whether there is convincing evidence of a new or unhealed lesion that fits the symptoms and would change management.
An MRI report should not become the entire treatment plan. The scan may show a meniscal abnormality, but pain can also come from cartilage, bone, the kneecap joint, tendons, or other structures. Conversely, difficulty interpreting a scan does not make the pain unimportant.
See the site’s discussion of knee MRI reliability for more on interpreting imaging alongside symptoms.
If the knee feels better, does the MRI need to look normal?
Another caller, Ron, reported that his knee had remained comfortable for 23 years after two prolotherapy treatments for a meniscus-related problem. He wondered whether another MRI would show what the meniscus looked like now. His call concerns long-term improvement after nonsurgical treatment; it is a different situation from Erica’s postoperative pain.
A comfortable, functional knee is a valuable result even when its structure has not been shown to return to a normal appearance. Ron’s account does not document the tear before or after treatment, so it cannot establish structural healing. It also does not provide a success rate for prolotherapy.
In a population study of 991 adults aged 50–90, meniscal abnormalities were common on MRI. Among participants with a meniscal tear, 61% had not experienced knee pain, aching, or stiffness during the preceding month. These findings show why a tear on an image cannot be assumed to explain every symptom. They do not mean that all tears are harmless. (6)
A repeat scan is most useful when it could answer a question that changes care. New swelling, true locking, a fresh injury, or loss of function may justify investigation. Scanning a comfortable knee solely to prove that an earlier treatment worked may instead reveal an abnormality that has no current clinical importance. After surgery, the additional interpretive difficulties described above still apply.
Pain, clicking, instability, and locking are different outcomes
A patient can improve in one symptom and remain limited by another. A 2018 cohort study of adults undergoing meniscal surgery found moderate improvement in some symptoms and small or no improvement in others at one year. General knee pain improved more than reported instability and general knee difficulties. Because this was an observational cohort, it cannot show that surgery was responsible for every change. (7)
This helps explain why “the operation went well” and “the knee still does not work well” can both be true. The repaired or trimmed tissue may not account for all the limitations.
Clicking, catching, and a physically locked knee should also be distinguished. Occasional clicking does not establish a displaced fragment. A knee that cannot straighten because something is blocking it is a different situation and warrants prompt assessment. Evidence about degenerative tears with intermittent mechanical symptoms should not be used to dismiss that distinction.
Rehabilitation can help—but it must fit the current knee
Pain and swelling can interfere with muscle function. Reduced thigh strength, incomplete extension, and altered movement can make walking and chair transfers harder. A rehabilitation reassessment can identify which deficits remain and whether the exercise load matches the knee’s tolerance.
An international meniscus rehabilitation consensus published in 2025 recommends progression based on the procedure and functional milestones. Rehabilitation after meniscectomy should be guided by criteria; repair and reconstruction also require attention to biological healing time. The authors acknowledge that much of the supporting evidence is limited. (8)
For someone still hurting well over a year later, the question is not simply whether physical therapy was completed. It is whether the current program addresses the current limitation and whether an unrecognized problem makes some exercises inappropriate.
Reducing repeated provocation, using a higher chair temporarily, or using walking support may make daily activity more manageable. These measures should accompany diagnosis-specific care rather than become the entire answer to unexplained persistent pain.
Returning to work requires recovery of capacity
Erica’s goal was to return to police work. A demanding job can require prolonged standing, stairs, repeated squatting, sudden direction changes, kneeling, or carrying equipment. A lower pain score alone does not establish readiness for every one of those tasks.
Recovery should consider knee motion, swelling, strength, control, and the ability to tolerate progressively greater activity. The meniscus rehabilitation consensus supports a procedure-specific, milestone-based approach; it does not establish one return-to-work date for every operation or occupation. (8)
A patient may have completed a course of physical therapy yet still have limitations that matter at work. Conversely, recurring symptoms during harder activity do not automatically mean the meniscus has torn again. They need to be interpreted alongside the examination and the actual load.
Improved symptoms after an injection can make rehabilitation more manageable, but feeling better does not by itself prove that the knee is ready for unrestricted loading. The outcome that matters is sustained function under the demands of daily life and the job.
Other nonsurgical options depend on the diagnosis
If osteoarthritis is an important source of symptoms, options may include exercise adapted to capacity, weight management when relevant, a cane, selected bracing, and medication. An established osteoarthritis guideline supports these approaches, including topical anti-inflammatory medication for knee arthritis and selected use of oral medication or joint corticosteroid injections. Medical history and risks should guide the choice. (9)
A brace may help a selected arthritic or unstable knee, but it does not replace removed meniscus tissue. Medication may reduce symptoms without repairing the underlying structure. A corticosteroid injection can be discussed for an appropriate inflammatory or arthritic joint problem, but it is not a solution for every postoperative diagnosis.
Persistent nerve-related pain may require a different treatment approach. Sleep disruption also deserves attention because it affects quality of life and coping. Addressing pain and sleep does not mean dismissing the knee’s structural condition.
These arthritis recommendations should not be applied automatically to a recurrent displaced tear or an insufficiency fracture. Identifying the diagnosis remains the step that makes the treatment useful.
Could PRP help pain after meniscus surgery?
PRP is prepared from the patient’s blood and contains concentrated platelets. Whether it may help depends on what is being treated now.
A 2024 double-blind randomized trial tested a single PRP injection immediately after partial meniscectomy. Ninety patients were randomized, and the injection did not significantly improve overall recovery compared with surgery alone through six months. Outcomes included pain, function, and activity. (10)
That study does not directly answer whether PRP may help a patient with established arthritis and persistent symptoms 19 months later. It does show why PRP should not be presented as a proven way to improve every meniscus-surgery outcome.
Similarly, research involving PRP during meniscal repair, nonsurgical treatment of an intact degenerative tear, and treatment of knee osteoarthritis addresses different situations. A benefit in one cannot be assumed to establish a benefit in all the others.
For this question, the proposed injection should name a target and explain the evidence relevant to that diagnosis. A reduction in pain would be meaningful, but it would not prove that removed meniscus tissue had grown back.
Nonsurgical PRP for an untreated tear is a different research question
A separate 2024 systematic review evaluated nonsurgical PRP for meniscus tears. Six studies included 184 patients. Clinical symptoms often improved, but MRI findings were variable, most included studies were case series, and comparative evidence was limited. The authors could not establish a consistent structural-healing outcome. (11)
These findings may inform discussion of selected chronic or degenerative tears. They do not establish that PRP replaces missing meniscus, repairs every recurrent postoperative tear, or consistently outperforms rehabilitation. The site’s review of PRP injections for meniscus tears discusses this treatment category further.
What about bone marrow concentrate or “stem cells”?
Bone marrow aspirate concentrate contains a mixture of marrow cells and other components. It is different from PRP and from a purified cell population grown in a laboratory.
A randomized trial of mild-to-moderate knee osteoarthritis compared marrow concentrate with PRP in 90 patients. Both groups improved, without a significant difference between them through two years. Later loss to follow-up limits certainty. The study did not specifically test persistent pain after meniscus surgery, and it did not establish replacement of missing meniscus tissue. (12)
That evidence can inform a discussion when arthritis is the identified problem. It cannot justify an assurance that marrow injections will fix a failed repair, correct alignment, or eliminate another operation.
Fat-derived preparations and donor umbilical-cord or Wharton’s jelly products are also biologically different. Their source does not establish equivalent effectiveness. None should be offered as a guaranteed remedy for unexplained postoperative pain. FDA guidance states that the regenerative medicine therapies it discusses have not been approved for orthopedic conditions. (13)
The site’s comparison of knee injections explains these choices more broadly.
Does research show that meniscus surgery never helps?
No. The evidence needs to be read according to the tear and patient population. A degenerative tear in a middle-aged arthritic knee is different from an acute displaced tear or a repairable root injury.
At five years, the ESCAPE randomized trial found exercise-based physical therapy remained noninferior to partial meniscectomy for patient-reported knee function in adults aged 45–70 with degenerative meniscal tears. This supports rehabilitation as an important option for that population. It does not answer how to manage every acute traumatic tear, root injury, or physically locked knee. (14)
A systematic review of arthroscopy for middle-aged and older patients with degenerative knee disease found only a small short-term pain benefit, with no sustained benefit at one to two years and no significant functional advantage. It also documented surgical harms. That supports caution about using arthroscopy as the routine answer to degenerative knee pain. It does not establish that all meniscus operations are inappropriate. (15)
A 2024 ten-year follow-up of a randomized trial adds another perspective. Patients aged 45 to 64 were assigned to exercise alone or arthroscopy plus exercise. At ten years, the groups had similar patient-reported outcomes and the same proportion with radiographic osteoarthritis among those assessed. The study did not find increased long-term arthritis in the surgical group; incomplete follow-up limits certainty. (16)
The authors considered surgery an option after an adequate trial of exercise had not relieved symptoms. However, similar outcomes at ten years do not demonstrate that surgery is necessary for every patient who remains symptomatic. This finding also differs from the observational joint-space study discussed earlier. The studies used different designs, populations, and outcomes; retaining both avoids turning a complex literature into a universal statement about benefit or harm.
For someone already operated on, neither study identifies the current pain source. They provide context for deciding whether a second operation has a clear purpose.
When is a revision meniscus repair considered?
Revision repair is an attempt to preserve a meniscus that has torn again or failed to heal. Whether it is appropriate depends on the tear pattern, remaining tissue quality, stability, cartilage, and other features of the knee. It is different from simply removing another portion of tissue.
A 2022 systematic review included four studies and 79 revision-repair patients, whose average age was approximately 24. Twenty repairs failed, a rate of 25.3%. Functional outcomes in the included series were generally favorable, and the authors concluded that revision repair could achieve outcomes similar to primary repair. The small studies and young population limit how confidently those results can be applied to an older arthritic knee. (17)
That failure rate is useful information for informed decision-making. It is not evidence that everyone with postoperative pain has a failed repair or needs revision. Before proceeding, the clinician should explain what lesion is being treated and how likely it is to account for the symptoms.
Bucket-handle tears: why a high failure rate needs context
A bucket-handle tear is a longitudinal tear with a portion that can displace toward the center of the joint. It can produce a mechanical block. Preserving the meniscus may be desirable, but healing and reoperation remain concerns.
A selected series examined a group of 39 patients with isolated medial bucket-handle repairs in stable knees. At an average follow-up of more than six years, 27 patients required reoperation with confirmation of failed healing. In 15 of those reoperations, less tissue was removed than would have been removed initially. Clinical scores nevertheless improved overall. (18)
The 69% failure rate should remain attached to that particular tear pattern, series, and definition of failure. It is not the general failure rate of meniscus repair. The study also illustrates a useful nuance: an unsuccessful attempt to preserve tissue may still leave more meniscus available than immediate removal would have. That possibility does not guarantee a good individual outcome.
Meniscus root tears are a separate mechanical problem
The meniscus roots anchor it to the bone. A root tear can compromise the meniscus’s ability to distribute load even when much of its tissue remains. This is different from a small degenerative fraying seen incidentally on MRI.
A review of root tears emphasizes the association with degeneration and the importance of cartilage condition, alignment, body mass index, and other factors in choosing treatment. Selected root repairs can have favorable outcomes. The review also discusses the relationship between root tears and subchondral insufficiency fractures. (19)
Nonsurgical treatment may help symptoms in some patients, particularly where repair is unsuitable, but symptom relief does not reattach the root. An injection should not be described as mechanically equivalent to repair. If a root tear or substantial meniscal extrusion is present, the treatment discussion needs to address that specific finding.
What if a substantial amount of meniscus is missing?
A knee with major meniscal deficiency presents a different problem from an intact meniscus with a small tear. Another trimming procedure cannot restore what has already been removed. However, it is also inaccurate to say that transplantation or knee replacement are the only possibilities for every patient.
The review of post-meniscectomy symptoms discusses rehabilitation and other nonsurgical care, selected scaffolds, meniscal allograft transplantation, cartilage procedures, alignment-correcting osteotomy, and joint replacement. Each has different indications. The evidence specifically supporting nonsurgical management remains limited, but a structural deficit does not make symptom management pointless. (1)
A meniscal allograft uses donor meniscus tissue and may be considered for selected symptomatic patients with substantial deficiency. It is not a routine treatment for all postoperative pain, and advanced arthritis may make other approaches more appropriate. Graft survival is also not the same outcome as being completely pain-free.
An osteotomy changes the alignment of the bones to redistribute load in an appropriately selected knee. Joint replacement addresses more advanced joint disease. These options deserve mention because nonsurgical care and reconstruction are different tools, rather than competing promises that work for everyone.
PRP, marrow, or another injection should not be said to replace a missing meniscus. A patient may achieve meaningful symptom improvement without structural restoration, but those outcomes must be described separately.
How can you avoid an unnecessary second operation?
Before considering another procedure, ask what diagnosis explains the pain, what findings support it, and what the proposed treatment would change. If surgery is recommended, the reason should be more specific than “the knee still hurts.”
An independent orthopedic or sports-medicine opinion can help clarify whether there is a mechanical problem requiring treatment or an opportunity for nonsurgical care. True locking, an unstable significant tear, or advanced structural disease may warrant a surgical discussion. Seeking an opinion does not commit someone to an operation.
Ron’s and Erica’s calls also illustrate why recovery should be described in several ways: symptoms, daily function, work or sports capacity, and structural findings. Improvement in one is meaningful, but it should not be used to make unsupported claims about the others.
For the person describing constant pain after March 2025 surgery, I would not promise a pain-free knee from an injection or a fixed number of treatments. I would begin with reassessment, particularly because walking and sleep remain affected. There may be useful nonsurgical options, but the best chance of choosing one well comes from identifying what the knee needs now.
Related articles
Meniscus tear information. Conservative care, surgery and injections in Los Angeles
References
References
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