A sprained knee from playing soccer usually takes about 1 to 3 months to gradually recover. If the patient has a mild sprain of the knee, with only contusions in the surrounding soft tissues and ligament continuity intact, this condition usually requires the use of tools such as casts and splints, and braking to slowly recover. Patients with severe sprains with torn ligaments, such as lateral collateral ligaments, cruciate ligaments, or severe meniscus injuries, usually need to be repaired surgically, and after a month or so of postoperative immobilization in a brace, the approximate total recovery period often takes about three months. If the patient has a sprained knee, it is recommended to go to the hospital in a timely manner, by the doctor according to the specific circumstances of the individualized diagnosis and treatment plan, in order to reduce the adverse effects of the disease.