If you still have pain one year after hip surgery, the possible reasons include infection and joint loosening, etc. You need to deal with the problem according to the reasons, and you can take surgical treatment and medication. 1. Infection: if there is still pain one year after hip surgery, there may be chronic infection in the joint, and the stimulation of inflammation can lead to severe pain in the joint, which needs to be treated with broad-spectrum antibiotics such as chloramphenicol and other antibiotics. 2. Loosening of the joint: If the surgery is hip replacement, there may be loosening of the artificial prosthesis, and the loosening of the prosthesis will stimulate the soft tissues around the hip joint as well as the bone tissues, which will trigger pain. In this case, you may have to undergo another surgery to replace the loosened prosthesis. 3. Osteoporosis: For elderly patients, the pain after hip surgery lasts for a long time, it may also be caused by their own lack of calcium leading to osteoporosis, which requires supplemental calcium and vitamin D, and localized hot compresses and other physical therapy to alleviate the pain. In addition to the above, there may be other reasons for the pain one year after hip surgery, such as muscle atrophy, improper selection of prosthetic joint specifications, etc. It is recommended to go to a regular hospital in time to find out the cause of the pain and actively treat it.