Osteoarthritis is a chronic and debilitating condition, and the hip joint is commonly affected. Total hip arthroplasty is an effective treatment for end-stage osteoarthritis. Intraarticular injections may be used to treat pain relief before total hip arthroplasty. There are controversies on whether intraarticular injections prior to total hip arthroplasty are safe because of concerns that they may increase the risk of infection after surgery. This study reviewed the most current published evidence from the past 20 yr regarding the risks of infection from intraarticular injections before total hip arthroplasty.