Occasionally, a hip replacement might not work correctly. Various factors can contribute to this, and common reasons include the following: infection, dislocation, loose implants, bone fracture, metal reactions, and allergic reactions. To address these concerns, a follow-up surgery known as a revision hip arthroplasty may be necessary. This involves replacing one or more implants from the initial hip replacement. In more complex cases, particularly with infections, multiple revision surgeries may be needed for a comprehensive solution. New technologies such as computer navigation are improving the accuracy of these surgeries. Typically, revision surgery requires a brief hospital stay to ensure proper recovery and address any challenges related to the initial hip replacement.