Nintendo thumb
（重定向自Nintendinitis）
Nintendo thumb, also known as gamer's grip, Nintendinitis and similar names, is a video game-related health problem classified as a form of repetitive strain injury (RSI). The symptoms are the blistering, paraesthesia and swelling of the thumbs, mainly through use of the D-pad, though any finger can be affected. This can lead to stress on tendons, nerves and ligaments in the hands, and further onto lateral epicondylitis ("tennis elbow"), tendinitis, bursitis and carpal tunnel syndrome (CTS).