Swollen knee may be caused by soft tissue injury, sprain, patella fracture and other diseases, need to take medication, surgical treatment for the cause of the disease. 1. Soft tissue injury: swollen knee may be caused by soft tissue injury. Patients can take oral painkillers under the guidance of the doctor, such as ibuprofen, celecoxib and so on. If there is an open wound, debridement can be taken. 2. Sprains: Swelling of the knee after a fall may also be caused by sprains. Patients can take oral non-steroidal anti-inflammatory drugs, such as aspirin, acetaminophen, etc. under the guidance of the doctor. 3. Patellar fracture: the knee is swollen from wrestling, also considered to be caused by patellar fracture. Patients need to take surgical treatment, such as wire ring suture, wire tension band suture, partial patellar resection. If the patient has severe pain, can also follow the doctor’s instructions oral painkillers, such as celecoxib, ibuprofen and so on. There are many reasons that cause patients to have swollen knees from falling, and the cause can be identified and then actively take treatment measures.