In academic papers, a pair of researchers at the University of the Sunshine Coast in Queensland, Australia, argues that the prevalence of bone growth in younger adults points to shifting body posture brought about by the use of modern technology. They say smartphones and other handheld devices are contorting the human form, requiring users to bend their heads forward to make sense of what’s happening on the miniature screens.

The researchers said their discovery marks the first documentation of a physiological or skeletal adaptation to the penetration of advanced technology into everyday life.

Health experts warn of “text neck,” and doctors have begun treating “texting thumb,” which is not a clearly defined condition but bears resemblance to carpal tunnel syndrome. But prior research has not linked phone use to bone-deep changes in the body.
--Washington Post

There's a fairly simple preventive for each: Find a place to rest your elbow, so you can hold the phone up instead of tilting your head down, and learn three-finger touch-typing, so you're not using your thumb[s].