Knee pain after playing soccer may be caused by knee soft tissue injury, ligament injury or meniscus injury, need to clarify the cause of the choice of physical therapy, surgical treatment and other methods of treatment. 1. Knee soft tissue injury: playing soccer for too long or too hard may cause knee soft tissue injury, resulting in knee pain, the greater the amount of exercise the more obvious symptoms of pain. This type of injury requires adequate rest, combined with ice, heat, massage and other physical therapy to improve the symptoms. Ice is applied within 72 hours of acute injury, and heat is recommended to be used after 72 hours. 2. Ligament injuries: Playing soccer with too much movement may lead to partial tear or complete tear of ligaments, and the main symptoms include knee pain, knee swelling and limited movement. The main symptoms are knee pain, swelling and limited mobility. The diagnosis can be made by MRI and physical examination. Partial ligament tear can be fixed with a brace, while complete tear requires ligament repair surgery. 3. Meniscus injury: Meniscus injury can be caused by twisting movements when playing soccer, and the main symptoms are knee pain, joint locking and limited movement. It can be diagnosed clearly by MRI, and the treatment is mainly based on surgery, such as arthroscopic meniscus suture, partial meniscectomy and so on. If you have knee pain after playing soccer, you need to go to the hospital as soon as possible, and the doctor will make individualized diagnosis and treatment plan according to the specific condition, so as not to delay the condition.