Pes Anserine Bursitis

Lower Limb

Overview

Pes anserine bursitis is inflammation of the bursa located between the pes anserinus tendons (sartorius, gracilis, semitendinosus) and the medial tibia, typically presenting with anteromedial knee pain. It is common in athletes, individuals with obesity, and those with biomechanical dysfunction such as knee valgus or excessive tibial internal rotation. The condition is usually self-limiting with appropriate conservative management including activity modification and addressing underlying causative factors.

Pathophysiology

The pes anserine bursa serves as a buffer between the three conjoined tendons and the underlying bone and medial collateral ligament. Repetitive friction from these tendons, particularly during activities involving knee flexion and hip internal rotation, leads to bursal inflammation and fluid accumulation. Chronic inflammation can develop from prolonged mechanical irritation without proper rehabilitation.

Typical Presentation

Site

Anteromedial knee, approximately 4-6 cm below the joint line, at the insertion point of the pes anserinus

Quality

Dull, aching pain; may describe as sharp with direct palpation or during provocative movements

Intensity

Mild to moderate (typically 3-6/10), often worsening with activity and improving with rest

Aggravating

Climbing stairs, running, long walks, knee flexion combined with hip internal rotation, sitting with knees crossed, direct pressure to the bursa

Relieving

Rest, ice application, anti-inflammatory medication, knee extension, hip external rotation stretching

Associated

Swelling over anteromedial knee, warmth in affected area, morning stiffness, pain with resisted hip adduction, possible knee effusion, tightness in hip internal rotators and adductors

Orthopaedic Tests

Test descriptions are written with AI assistance from standard clinical texts. Where a test lists Sources, its description has been checked against them; those sources are independent and do not endorse OsteoKit. Accuracy figures and grades (A–D) appear only when checked against the published study; tests without one are marked “No accuracy study”.

Further reading: full test procedures are described in standard clinical examination texts, e.g. Magee & Manske, Orthopedic Physical Assessment (7th ed.), and Cook & Hegedus, Orthopedic Physical Examination Tests: An Evidence-Based Approach (2nd ed.).

No accuracy study

Ultrasonographic Imaging / Palpation Correlation

Procedure

Performed by a trained sonographer or clinician: ultrasound of the pes anserine area, noting where the patient is tender.

Positive Finding

Fluid in the pes anserine bursa or changes in the tendons at the point of tenderness.

Interpretation

Can confirm bursal fluid and look at the tendons and MCL nearby. Many patients with typical symptoms have no visible fluid, so a normal scan does not exclude the diagnosis. Ultrasound can demonstrate pes anserine bursal distension, but the figure previously shown lacked a specificity value and is not traceable to a confirmed diagnostic-accuracy study; pes anserine bursitis remains a clinical diagnosis.

Sources

No accuracy study

Pes Anserine Tenderness Test

Procedure

Patient supine or seated, knee slightly bent. Palpate the upper inner tibia below the joint line, where the sartorius, gracilis and semitendinosus tendons insert, and compare sides.

Positive Finding

Tenderness over the pes anserine area that reproduces the familiar pain.

Interpretation

Supports pes anserine bursitis or tendinopathy. Tenderness here is common in people with knee osteoarthritis, which often coexists. Joint line tenderness points to the meniscus or joint instead; tenderness along the MCL points to the ligament.

Sources

No accuracy study

Pes Anserine Palpation with Knee Movement

Procedure

Patient supine. Keep pressure over the pes anserine area while bending and straightening the knee.

Positive Finding

Reproduction of the familiar inner knee pain under your finger during movement.

Interpretation

Not a recognised test; the Noble test is for the ITB. Pain here supports a local source but does not rule out problems inside the joint.

Further reading

No accuracy study

Resisted Hip Adduction Test

Procedure

Patient side-lying on the affected side, top leg supported. Ask the patient to lift the lower leg towards the ceiling (hip adduction) against resistance.

Positive Finding

Pain at the pes anserine area during resisted adduction.

Interpretation

Loads gracilis, one of the pes anserine tendons. Pain at the inner knee rather than the groin supports a pes anserine source.

Sources

No accuracy study

Resisted Knee Flexion Test

Procedure

Patient prone or seated, knee bent to about 60–90°. Ask the patient to bend the knee further against resistance, with the tibia turned inwards to bias the medial hamstrings.

Positive Finding

Pain at the pes anserine insertion rather than in the back of the thigh.

Interpretation

Loads semitendinosus and sartorius. Pain at the insertion supports a pes anserine source; pain in the muscle belly points to a hamstring strain.

Sources

No accuracy study

Single-Leg Rotation in Flexion

Procedure

Patient stands on the affected leg, knee slightly bent, and rotates the body in and out a few times with support for balance. Ask where any pain is felt.

Positive Finding

Pain at the upper inner tibia rather than at the joint line.

Interpretation

Not a recognised test for pes anserine problems; the Thessaly test is a meniscal test. Joint line pain in this position should prompt a meniscal assessment.

Further reading

⚠ Red Flags

  • •Sudden onset following direct trauma with significant swelling and ecchymosis
  • •Signs of systemic infection: fever, chills, spreading erythema, regional lymphadenopathy
  • •Severe unrelenting pain unresponsive to conservative treatment suggesting alternative diagnosis
  • •Locking or catching sensations indicating possible meniscal pathology
  • •Significant knee instability or giving way suggesting ligamentous injury
  • •Night pain disrupting sleep or pain at rest suggesting inflammatory arthropathy

⚡ Yellow Flags

  • •High pain catastrophizing beliefs regarding the injury
  • •Fear-avoidance behaviors limiting activity beyond clinical necessity
  • •Anxiety about returning to sport or work activities
  • •Psychosocial stressors affecting rehabilitation compliance
  • •Perceived lack of control over symptoms
  • •Previous chronic pain conditions or somatization patterns
  • •Poor sleep quality exacerbating inflammation and recovery

Osteopathic Techniques

It usually settles with conservative care: rest, ice, short-term NSAIDs and physiotherapy focused on stretching and strengthening, especially the hamstrings and adductors.

Region

Anteromedial knee (pes anserinus)

Technique

Soft tissue, knee and quadricepsNo trials found

Rationale

Hands-on work to the quadriceps and the tissues around the knee to ease tension and pain.

How it's done & evidence

How it's done

Hands-on kneading, stroking and sustained pressure to the quadriceps, the patellar and quadriceps tendons, the iliotibial band near the knee and the tissues around the joint. Transverse friction massage across a tendon is one form. In trials it was given alongside exercise.

Evidence in Pes Anserine Bursitis

Searched 24 Oct 2026: no trials of soft tissue technique in pes anserine bursitis.

Region

Hamstrings and adductors

Technique

Muscle energy, hip and thigh musclesNo trials found

Rationale

Low-force, patient-powered stretch for tight hip and thigh muscles.

How it's done, cautions & evidence

How it's done

The muscle (for example the hamstrings, adductors or rectus femoris) is taken to its barrier. The patient pushes gently, at about 10–20% effort, against resistance for 5–10 seconds, relaxes for 3–5 seconds, and the new barrier is taken up.

Cautions

Not used with an acute fracture, a joint infection or a bone malignancy; take care with severe osteoporosis or after surgery that limits muscle contraction. Use the least force needed: too much can tear a muscle or pull off a tendon, especially in older patients.

Evidence in Pes Anserine Bursitis

Searched 24 Oct 2026: no trials of hamstring or adductor muscle energy technique in pes anserine bursitis.

Region

Hamstrings and adductors

Technique

Soft tissue, hip and thighNo trials found

Rationale

Eases tension in the hip and thigh muscles that help control knee alignment.

How it's done & evidence

How it's done

Hands-on kneading, stretching and sustained pressure to the muscles around the hip and thigh: the hip flexors, adductors and hamstrings, and tensor fasciae latae with the iliotibial band.

Evidence in Pes Anserine Bursitis

Searched 24 Oct 2026: no trials of hip soft tissue technique in pes anserine bursitis.

Sources

Region

Tibiofemoral and patellofemoral joints

Technique

Articulation, knee (tibiofemoral and patellofemoral)No trials found

Rationale

Gentle, rhythmic glides of the knee and kneecap within their range to ease pain and stiffness.

How it's done, cautions & evidence

How it's done

Passive, low-velocity glides of the knee within its range, with no thrust: distraction and front-to-back glides of the tibia on the femur, and glides of the kneecap in each direction, usually 2–3 oscillations a second for 1–2 minutes. A Mulligan variant holds a sustained glide of the tibia while the patient actively bends and straightens the knee.

Cautions

In knee osteoarthritis trials, no serious adverse events were reported with manual therapy.

Evidence in Pes Anserine Bursitis

Searched 24 Oct 2026: no trials of knee mobilisation in pes anserine bursitis.

Rehabilitation Exercises

Hip Adductor (Gracilis/Adductor Longus) Stretch

StretchingBeginner

Sartorius Stretch (Supine Figure-4 with Flexion)

StretchingBeginner

Hip Internal Rotator Stretch (Figure-4 Piriformis)

StretchingBeginner

Hip Abduction with Resistance Band (Standing)

StrengtheningIntermediate

Gluteus Medius Activation (Clamshells)

StrengtheningBeginner

Single-Leg Stance with Hip Control

StrengtheningIntermediate

Step-Up with Emphasis on Hip Abductor Control

StrengtheningIntermediate

Single-Leg Balance with Dynamic Arm Reach

BalanceIntermediate

Hip Internal and External Rotation (Supine)

Range of MotionBeginner

Hip Abductor Activation During Gait (Walking with Resistance Band)

PosturalIntermediate

Side-Lying Hip Abduction with Knee Extended

StrengtheningIntermediate

Stationary Cycling with Proper Knee Alignment

CardiovascularIntermediate

Referral Criteria

  • •Failure to improve after 4-6 weeks of conservative treatment with appropriate activity modification and rehabilitation
  • •Clinical signs suggestive of meniscal pathology (locking, catching, positive McMurray test)
  • •Evidence of knee ligamentous instability requiring structural imaging or specialist assessment
  • •Suspected septic bursitis evidenced by fever, significant local warmth, erythema, and severe pain
  • •Persistent swelling and symptoms requiring imaging confirmation or ultrasound-guided aspiration
  • •Signs of underlying inflammatory arthropathy (bilateral symptoms, morning stiffness >1 hour, elevated inflammatory markers)
  • •Recurrent bursitis suggesting anatomical abnormality or need for advanced imaging (MRI) and specialist management
  • •Symptoms suggestive of referred pain from hip (osteoarthritis) or lumbar spine requiring alternative management approach