What causes soreness and pain in the tendons of the popliteal fossa (the area behind the knee)?

The popliteal fossa—the anatomical region located at the back of the knee—is commonly referred to as the “popliteal area.” Popliteal pain has multiple potential causes, which can be broadly categorized into the following four points:

1. Prolonged maintenance of a single posture—such as standing or sitting for extended periods—can lead to popliteal pain. This is typically due to injury or strain of the popliteal fascia and musculature. In such cases, patients are advised to avoid prolonged sitting or standing.

2. In patients with osteoarthritis, involvement of surrounding soft tissues may cause pain in the posterior aspect of the knee (i.e., the popliteal fossa). Diagnosis is confirmed via X-ray imaging. If the posterior horn of the meniscus is injured, pain in the popliteal fossa often occurs during knee flexion or squatting; magnetic resonance imaging (MRI) is required for definitive diagnosis.

3. Some patients experience popliteal pain due to a cyst in this region. As the cyst enlarges, it may compress adjacent arteries and subcutaneous nerves, resulting in pain. In such cases, evaluation of the cyst’s nature is essential. Smaller cysts may resolve spontaneously or with massage-assisted absorption; however, larger cysts—particularly those exhibiting progressive enlargement—require surgical excision for definitive treatment. Pain typically subsides once the cyst is removed.

4. In certain patients, popliteal pain arises from venous thrombosis. Anticoagulant and vasodilatory therapies are indicated. During treatment, strict bed rest is recommended to alleviate pain.