Popliteal tendon strains occur when there is an injury to the semitendinosus, semimembranosus, triceps and other tendons in the popliteal fossa, which is located on the posterior side of the knee. The first thing you will feel after the injury is pain in the popliteal fossa, local swelling, subcutaneous bruising, positive pressure pain in the popliteal fossa, negative heel percussion pain, and severe popliteal tendon strain, which will affect the flexion and extension of the knee joint. An MRI of the popliteal fossa can be taken to determine the extent of the popliteal strain. If the tendon is partially strained, it can be treated conservatively by applying topical ointment to activate blood circulation and remove blood stasis, or applying topical Fotarine spray to relieve pain. If there is a complete rupture of the tendon, surgical treatment should be taken, which can be done through arthroscopy and minimally invasive surgery.