The treatment of knee swelling and pain after falling down from cycling needs to be based on the degree of injury, generally speaking, including knee braking and rest, early ice, plaster or splint fixation and surgical treatment and other ways. 1. Light injury: mainly refers to soft tissue injuries, the treatment is mainly based on conservative treatment, including knee braking and rest, elevation of the affected limb, early ice packs, if there are local abrasions, saline, hydrogen peroxide, iodine rinse, and regular medication changes. 2. Heavy injury: mainly refers to the fracture or fracture accompanied by neurovascular injury, if the fracture is not obvious displacement, feasible plaster or splint fixation, if the fracture is accompanied by displacement or neurovascular injury, need to consider surgical incision and internal fixation and other treatments. If the symptoms of swelling and pain in the knee are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, to clarify the degree of injury and then give targeted treatment.