Texting frequently with thumbs may cause tendinitis
Tendons in the hand can thicken abnormally and develop tendinitis in people who text frequently using their thumbs, says a study published online in the American Journal of Physical Medicine & Rehabilitation.
Even when texting with two thumbs, most people tend to put greater stress on the thumb of their dominant hand, the study found. Repetitive joint movements are a common cause of chronic tendon injuries in large joints, such as the shoulder, but overuse injuries of the small tendons have received little attention, it said.