Why does the back of the knee (popliteal area) hurt after running, and what should I do about it?

Pain behind the knee or in the back of the leg after running may be caused by factors such as cartilage damage, bone spurs (osteophytes), or patellar chondromalacia. It is important to visit a hospital for an accurate diagnosis and to relieve discomfort through medication or surgical treatment. Specific causes are analyzed as follows:

1. Cartilage Damage

Long-term running and exercise can cause friction and injury to the knee joint, leading to cartilage damage, which may result in pain when bending the knee. Patients should follow medical advice to take medications such as glucosamine sulfate granules, diclofenac sodium enteric-coated tablets, or celecoxib tablets.

2. Bone Spurs (Osteophytes)

Frequent running may lead to bone spurs in the knee area, causing pain. During movement or leg flexion, the bony growths may irritate surrounding tissues, worsening the pain. In severe cases, surgical removal of the bone spurs may be necessary.

3. Patellar Chondromalacia

Patellar chondromalacia refers to an osteochondral condition caused by excessive tension or pressure on the upper and lower poles of the patella. After running, decreased muscle strength can increase pressure between bones, resulting in pain at the back of the knee, particularly when bending the leg. Patients may take medications such as ibuprofen sustained-release capsules, celecoxib tablets, or aspirin capsules under medical guidance.

In addition, other conditions such as muscle strain, meniscus injury, and fasciitis may also cause these symptoms. Patients are advised to seek timely medical evaluation to determine the underlying cause and receive appropriate treatment.