The next time you take a selfie, think twice. You could end up with a 'selfie wrist'. According to Dr. Levi Harrison, a California-based doctor, this is a form of a carpal tunnel syndrome. The symptoms include a tingling or sharp pain that comes from flexing your wrist or holding your phone for too long. The number of cases of patients with a selfie wrist have risen worldwide and it is becoming an emerging digital age problem.