Self-healing time after a fall on the knee is related to the severity of the fall and the patient’s own condition, light 1~2 weeks can be self-healing, such as fracture, young patients later treatment time is generally 1~2 months, older comminuted fracture healing time needs 3~6 months. 1. If the degree of knee fall is light, only mild soft tissue swelling, without injury to the bone tissue, generally 1~2 weeks after the self-healing. 2. If there is a fracture, generally need to go to the hospital in time for treatment, for young patients, its bone tissue healing ability is relatively strong, generally in the fixation after 1 ~ 2 months after the fracture can be gradually healed, and after that, but also to carry out functional exercise, to promote the full recovery of the function of the limb. 3. If the fracture occurs in older patients, the healing time tends to be slower, and in severe cases such as comminuted fracture, the recovery time will generally take 3~6 months after surgery for reduction and internal fixation. If the surgery is uneventful, or if you seek medical attention late, the recovery and healing time will be longer. After a knee injury, it is recommended that you seek medical attention in a timely manner to avoid delays that could worsen your condition.