Pes bursitis: a clear guide

A bursa is a thin, fluid-containing cushion that reduces rubbing between moving tissues. The pes anserine bursa is located on the inner side of the upper shin, below the main knee joint line. Pressure, repeated bending, altered walking mechanics or nearby tendon overload can irritate it. Symptoms may include a sore spot, pain on stairs and discomfort when lying on the affected side. Because several knee conditions can feel alike, examination is useful when the location is unclear or symptoms persist.

Visible puffiness can occur, but it is not required; the broader topic of [Joint Swelling](/symptoms/joint-swelling/) explains how swelling may present.

Pause kneeling and reduce the activity that repeatedly rubs or loads the inner knee. Keep gentle, comfortable movement and use a covered cold pack after aggravating activity if helpful. Discuss [Anti-Inflammatory Medication](/treatments/non-surgical-orthopedics/anti-inflammatory-medication/) with a clinician or pharmacist rather than choosing it solely from a label. If conservative care does not settle symptoms, a clinician may discuss a [Cortisone Injection](/treatments/non-surgical-orthopedics/cortisone-injection/). [Joint Aspiration](/treatments/non-surgical-orthopedics/joint-aspiration/) is reserved for selected situations, such as when fluid needs assessment or removal.

Arrange a review if pain interferes with ordinary walking, persists despite activity changes or keeps returning. Seek prompt care for fever, a hot red knee, rapidly increasing swelling, wound drainage, inability to bear weight or severe pain after an injury. These signs can reflect infection or another condition rather than uncomplicated bursitis.

Where exactly is the inflamed structure? What activity should I change first? Are medicines safe with my medical history? Would physiotherapy, imaging, injection or aspiration help clarify or treat the problem?