Total hip arthroplasty operation is one of the most common surgical procedures practiced by orthopaedic surgeons in our country. Postoperative complications have a negative influence on the success rate of the procedure in general. The main factors that determine the postoperative satisfaction of the patient are infection, deep venous thrombosis, and mechanical complications. In this review, current diagnosis and treatment algorithms for periprosthetic fractures, heterotopic ossification, implant failure, neurovascular complications, and instability are explained. Generally, the treatment of mechanical complications starts by taking preventive measures; and if they are inevitable, the cause and treatment algorithm of these complications had to be learned meticulously before intervening. Proper handling of these factors lead to successful results in most of the cases.