"Overuse of a smartphone can potentially lead to injuries of the thumb or hand, such as De Quervain's tendonitis," said Erica Taylor, MD, a hand specialist at Duke Orthopaedics of Raleigh. De Quervain's tendonitis is an inflammation of the tendons of the thumb that extend to the wrist. The pain may travel into the thumb or up the forearm.
"I haven't seen any patients because of overuse of their smartphone, but I have had patients complain of wrist tendonitis after prolonged video game use on their tablets. Treatment typically includes rest, anti-inflammatory medication and in significant cases, hand therapy and cortisone injections."