Side effects of hip replacement surgery include allergic reactions that result in prosthesis failure, blood clots and infection surrounding the artificial hip joint, according to Florida Hospital. In rare cases, nerve injury can occur following the procedure.
Hip dislocation is another complication of hip replacement surgery that occurs when the artificial hip ball becomes dislodged from the hip socket, according to the National Institute of Arthritis and Musculoskeletal and Skin Diseases. Hip dislocation typically occurs due to the fact that the prosthetics are smaller in size than natural hip balls and sockets, making it easier for the ball to come loose. One of the positions that increases the risk of dislodging the hip is pulling the knees toward the chest.