How long it takes for subacromial impingement to heal depends on two factors: 1. Subacromial impingement, in general, has a slightly longer non-surgical treatment period. If subacromial impingement is suitable for non-surgical treatment, the treatment period is about 2 weeks, but it does not mean that 2 weeks will necessarily lead to a complete cure. There are also a series of precautions, such as avoiding recurrence and rehabilitation exercises, which take longer. Usually, the time from onset to healing of common subacromial impingement rarely exceeds 1 year. 2. Surgical treatment, if the impingement bone is removed under surgery, grinding off the bone and removing the subacromial bursa, the disease will soon recover. However, some patients have not only impingement, but also shoulder joint pain, with impingement as the main cause, combined with rotator cuff tears, ligament damage, and even degeneration of the shoulder joint itself. In this case, the patient has a long course of the disease, and after the impingement is cured, there are still some symptoms that come from other degenerations of the shoulder joint itself, such as osteoarthritis, ligament degeneration, rotator cuff tears, etc.