People claim that excessive use of a mobile phone causes "iPhone pinky" - a condition in which the pinky is deformed. Medical experts are quick to reassure: there is no such thing as an 'iPhone pinkie' Dr.
Peter Evans, an orthopedic surgeon at the Cleveland Clinic, says excessive cell phone use can cause a variety of joint problems. "iPhone elbow" — known medically as cubital tunnel syndrome — is very real, Dr. Evans says. Overuse of the phone can worsen underlying conditions like arthritis, or cause new problems with the tendons of the thumb.