After a knee sprain with swelling, the following methods can be used for treatment: 1. If the sprain is only mild, the joint needs to be treated with a short period of braking, rest and cold compresses, which can quickly and completely relieve the symptoms of swelling, and the patient can resume normal life and sports. 2. More serious knee sprains, resulting in swelling and pain, need to take MRI of the knee and X-ray of the knee joint If there is damage to the meniscus, ligaments and other structures, arthroscopic minimally invasive surgery needs to be considered. If a fracture dislocation exists, manual repositioning, incisional internal fixation or external fixation needs to be used quickly to restore the stability of the fracture severed end in order to bring about rapid relief of swelling and pain symptoms. Patients should take care to avoid sprains of the knee joint in their normal life.