Pain after ACL surgery is usually after a week or so, but the exact time it goes away needs to vary from person to person. After a knee injury resulting in an ACL injury, if the ligament is significantly torn, it will destabilize the knee joint. Most patients need surgical treatment, postoperative pain is usually about a week, only after the reconstruction of the anterior cruciate ligament can restore the stability of the knee joint, otherwise the later easily complicate the knee meniscus injury or serious osteoarthritis. In the early stage after ACL surgery, the knee joint needs to be immobilized with a brace for a period of time, and then gradually carry out passive and active functional activities. Patients are advised to review their condition and consult their treating doctor if they have any discomfort.