The swelling and pain usually goes away for about a month after rotator cuff injury surgery, but it varies from person to person. After rotator cuff injury surgery, patients usually experience swelling and pain, and this phenomenon usually lasts for about a month. However, because of the different sensitivity and tolerance of each person, some last for a shorter period of time, usually around 20 days, while others last longer, up to around 40 days, overall in about a month. In addition, depression or prolonged use of narcotic analgesics before surgery can lead to prolonged postoperative pain. Postoperative swelling and pain is normal, but if the pain is severe, you can take oral non-steroidal anti-inflammatory drugs such as Nimesulide and Celecoxib to reduce inflammation and pain. After the operation, you should also pay more attention to rest and take more proteins such as eggs and milk to promote the recovery of the body and shorten the pain time. The above medications should be taken under the guidance of professional physicians and pharmacists.