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Knee · Pes Anserine Tendinopathy / Bursitis

Anserine Syndrome

Irritation just below the inner knee, on the proximal shin, where three thigh muscles (the ‘pes anserine’: sartorius, gracilis and hamstring) share a tendon attachment. It’s an overuse/load problem of that tendon and its bursa, not a joint or cartilage problem.

Inner-knee tendon overload commonly accompanies knee arthritis, extra weight, tight or weak hamstrings and adductors, or increased running. Its low, inner location can mimic meniscus or joint-line pain. Strengthen and stretch those muscles, easing aggravators.

How it typically shows up

Tenderness over the proximal-medial tibia about a hand’s width (≈5 cm) BELOW the medial joint line, where the pes anserine tendons insert, aggravated by stairs and rising from a chair, often alongside knee OA or in overweight/running adults. Distinguished from joint-line (OA/meniscus), anterior (PFPS/tendinopathy) and lateral (ITBS) knee pain by that below-joint-line medial location.

How long recovery takes

Symptoms usually settle with conservative care over roughly 6-8 weeks: ease aggravators, progressively strengthen adductors, hamstrings, quads and hips, and stretch hamstrings and adductors. Some loading discomfort is fine if settled by next morning.

The phased recovery approach

  1. Phase 1 · 1–2 weeks

    Calm

    Ease painful activity, then gently strengthen and stretch to settle inner-shin pain.

    What you get back: sitting with less inner-shin ache.

    • Prone Hamstring Curl: 2–3 sets × 10–15 reps · Curl up slowly and lower even more slowly. · Lie on your front with your legs straight.
    • Hamstring Stretch: 3–4 sets × 30–60s hold · Feel a gentle pull, not pain. · Sit or stand with one leg straight ahead.
    • Inner-Thigh Stretch: 3–4 sets × 30–60s hold · Feel a gentle stretch with no pain. · Sit with the soles of your feet together.
    • Adductor Squeeze: 2–3 sets × 10–15 reps · Hold steady and keep breathing. · Sit or lie, knees bent, pillow or ball between them.

  2. Phase 2 · 2–5 weeks

    Rebuild

    Build up the inner-thigh and hip muscles so they take load off the sore inner-shin spot.

    What you get back: stairs and squats without the inner-shin pull.

    • Hamstring Bridge: 2–3 sets × 12–15 reps · Drive through your heels, not toes. · Lie on your back, knees bent, heels close to your body.
    • Side-Lying Hip Adduction: 2–3 sets × 12–15 reps · Lift with your inner thigh, lowering with control. · Lie side-on, top knee bent, foot ahead of your bottom leg.
    • Squat to Chair: 2–3 sets × 12–15 reps · Keep the knees tracking over the toes. · Stand in front of a chair, feet shoulder-width apart.
    • Step-Up: 2–3 sets × 12–15 reps · Control the return, don’t drop back down. · Stand facing a sturdy step or low box.

  3. Phase 3 · 2–4 weeks

    Walking

    Increase walking time, maintaining inner-knee strength for shin comfort.

    What you get back: everyday standing, sitting and time on your feet, comfortably.

    • Hamstring Bridge: 3 sets × 12–15 reps · Drive through your heels, not toes. · Lie on your back, knees bent, heels close to your body.
    • Side-Lying Hip Adduction: 3 sets × 12–15 reps · Lift with your inner thigh, lowering with control. · Lie side-on, top knee bent, foot ahead of your bottom leg.
    • Prone Hamstring Curl: 3 sets × 12–15 reps · Curl up slowly and lower even more slowly. · Lie on your front with your legs straight.
    • Graded Walking: 1 set × 10–30 min of activity · Shorten the walk if pain climbs during it. · Start walking at a comfortable, easy pace.

Exact exercises, sets and progression depend on your severity, equipment and goal. This is the shape of the program, not a one-size prescription.

What matters while you recover

  • It’s not your joint, and it usually settles

    This pain comes from the tendons just below the inner knee, not the joint, and it usually settles on its own with stretching, strengthening, and easing the aggravators.

  • Strengthen the inner-knee muscles

    Strengthen and stretch the inner-thigh, hamstring, quad and hip muscles, building gradually. Discomfort while you load is fine if it is back to baseline by next morning.

  • Ease the aggravators for now

    Ease off what flares the inner-knee spot (stairs, rising from a low chair, crossed-leg sitting, deep squats), then rebuild gradually as it calms.

Common questions

Is this a meniscus tear?
Probably not. Pes anserine pain sits about a hand’s width BELOW the joint line, on the bony shin, whereas a meniscus problem is felt right at the joint line. The location is the giveaway, though the two are easy to confuse.
Will it go away on its own?
It’s generally self-limiting and usually settles with rest, stretching and strengthening. Most cases resolve without any procedure.
Why strengthen the inner thigh and hamstrings?
Those muscles (the adductors and hamstrings) form the pes anserine tendon. Strengthening them, along with the quads and hip, supports knee function.

Related knee conditions

Sources