It usually takes about 3 months to return to normal after knee free body surgery. A knee free body is a lump of bone or cartilage that exists in the knee joint cavity. When the knee joint flexes and extends, the free movement of the free body may be stuck in the joint space, which may cause discomfort such as pain, popping and embeddedness of the knee joint, and require prompt medical treatment and surgery if necessary. After knee free body surgery, you should pay attention to wound dressing to avoid wound infection; pay more attention to bed rest and reduce knee activities; eat more milk, pork ribs, lean meat, seaweed, beans and other foods rich in protein and calcium, and consume more fresh vegetables and fruits; under the guidance of the doctor, you should actively perform the strength training of the muscles around the knee joints and the joint mobility training, and usually return to normal in 3 months after the surgery. After knee joint free body surgery should actively follow the doctor’s instructions for treatment and care, postoperative regular review, usually 3 months after surgery can return to normal.