Do You Need Surgery for a Torn Meniscus?

If you’ve been told you have a torn meniscus, the first question is usually the scariest one: do I need surgery? For many people, the answer is no. Plenty of meniscus tears — especially smaller ones and wear-related (degenerative) tears — settle down with rest, physical therapy, and activity changes. Surgery comes into the picture mainly when the knee locks or catches, or when pain keeps going despite good rehab. What’s right for you depends on the tear’s type, size, and location, plus your age and how active you are. Here’s how the decision actually gets made.

On this page

• Do you need surgery for a torn meniscus?
• When can a tear be treated without surgery?
• When is surgery recommended?
• Why the location of the tear matters
• Repair vs. partial meniscectomy
• What if you leave a tear untreated?
• Frequently asked questions

Do you need surgery for a torn meniscus?

Not always. According to the American Academy of Orthopaedic Surgeons, many meniscus tears do not need immediate surgery — if your symptoms settle and the knee isn’t locking or swelling, nonsurgical care is often the first step. The decision comes down to a few things: how big the tear is, where it sits in the meniscus, whether the knee catches or locks, your age, and how active you are. A careful exam and an MRI usually give your surgeon the full picture.

When can a tear be treated without surgery?

Nonsurgical care tends to work when the tear is small or stable, the knee isn’t locking, and the pain is manageable. Wear-related tears in middle-aged and older adults often fall into this group. The usual plan is RICE (rest, ice, compression, elevation), activity changes, physical therapy to strengthen the muscles around the knee, and sometimes a cortisone injection to calm a flare. These steps don’t stitch the tear back together, but they can ease symptoms and get many knees working well again. For wear-related tears in particular, studies have found that a good physical therapy program often works about as well as arthroscopic surgery for easing pain and improving function — a big reason we don’t rush to operate on a degenerative tear. Our knee pain team usually starts there and reserves surgery for knees that don’t respond.

When is surgery recommended?

Surgery moves up the list when the knee locks or catches — a sign that a torn flap is physically blocking movement — or when pain and swelling keep going despite a solid course of rehab. Younger, active people with a traumatic tear are also more likely to be surgical candidates, partly because their tears are more often repairable. As the Mayo Clinic notes, surgery may be recommended if the knee stays painful despite rehabilitation or if it locks. Even then, a good surgeon first confirms the meniscus is the real source of the pain, since knee arthritis can cause similar symptoms and won’t be fixed by trimming a tear.

Why the location of the tear matters

The meniscus only has a blood supply in part of it, and blood supply is what lets tissue heal. The outer third is the “red zone,” which has good blood flow — tears here can sometimes heal on their own or be stitched back together. The inner two-thirds is the “white zone,” with little to no blood flow, so tears there usually can’t heal even if stitched. That single fact drives much of the surgical decision, including which operation makes sense. You can learn more on our torn meniscus page.

Repair vs. partial meniscectomy: what’s the difference?

Both operations are done with knee arthroscopy — small incisions, a camera, and an outpatient visit you go home from the same day. What differs is the goal. A meniscus repair stitches the torn edges together to save the meniscus. A partial meniscectomy trims away the torn, unstable piece. Saving the meniscus is better for the knee long term, so a repair is preferred when the tear can heal — but that isn’t always possible.

The longer recovery for a repair is simply because stitched tissue needs time to heal, while trimmed tissue does not. Your surgeon weighs the tear’s location and your activity level to recommend the option that protects your knee best over the years ahead.

What if you leave a torn meniscus untreated?

It depends on the tear. A small, stable tear may quiet down and cause few problems. A larger or unstable tear left alone can keep catching, aching, and swelling, and a loose fragment can lock the knee. Over time, an untreated symptomatic tear can also add to joint wear. That doesn’t mean every tear needs fixing — it means a tear that keeps bothering you is worth having evaluated rather than pushing through.

Frequently asked questions

Does a torn meniscus always need surgery?

No. Many tears — especially small, stable, or wear-related ones — improve with rest, physical therapy, and activity changes. Surgery is usually considered when the knee locks or catches, or pain continues despite rehab.

Will walking make a meniscus tear worse?

With a small or moderate tear, light walking is often fine if the knee feels stable. It’s best to avoid deep squatting, twisting, and prolonged standing, and to stop and get checked if the knee locks, gives way, or swells.

What percentage of meniscus tears need surgery?

There’s no single number — it varies with the tear and the person. Many tears are managed without surgery, while locking, instability, or pain that doesn’t settle with rehab makes an operation more likely.

Is a medial meniscus tear different?

The medial (inner) meniscus is the more commonly torn side, but the same rules apply. The tear’s location, size, type, and your symptoms — not simply which side — decide whether surgery makes sense.

Does meniscus surgery lead to a knee replacement?

Surgery doesn’t directly cause a replacement, but removing meniscus tissue can raise the long-term risk of arthritis. That’s a key reason surgeons prefer to repair and preserve the meniscus whenever a tear can heal.

How long is recovery?

A partial meniscectomy usually takes about 3 to 6 weeks, while a meniscus repair takes about 3 to 6 months because the stitched tissue has to heal. Physical therapy is a big part of a good outcome either way.