Knee pain after exercise may be caused by knee ligament injury, patella fracture, knee meniscus injury and other reasons, you can choose general treatment, drug treatment, surgical treatment and other ways of treatment according to the cause of the disease. 1. Knee ligament injury: The ligaments near the knee joint are injured by violence during sports, resulting in ligament injury or even rupture, causing knee pain. It can be fixed with plaster cast or surgically repaired. 2. Patella fracture: Patella tear and fracture caused by falling down and kneeling on the ground and violent contraction of quadriceps muscle in the course of sports, resulting in pain at the knee. No displacement of the patella fracture can be fixed through the plaster cast or lower limb support and rehabilitation exercise treatment, pain is obvious can follow the doctor’s advice oral ibuprofen, celecoxib and other non-steroidal anti-inflammatory drugs analgesic treatment. There is obvious displacement can be used to cut and reset the treatment. 3. Knee meniscus injury: the half-moon cartilage in the knee joint is called meniscus, long-term strenuous exercise can lead to meniscus injury, causing knee pain. If the symptoms are mild, it can be fixed by plaster, and if it is completely torn, meniscectomy is feasible. Knee pain after exercise should go to the hospital in a timely manner, improve the examination, and give targeted treatment after the cause of the disease is clear.