Social media is full of health hacks for better sleep, clear skin, a functioning gut, you name it. Lately, a tip for aging and cognitive function is gaining traction. Videos showing hand and finger ...

Many of us have experienced pain caused by repetitive motion involving our phones, whether scrolling through news feeds or swiping from screen to screen. There’s even a name for it: Android thumb.

A office worker identified as Mr. Park, who was rapidly moving his thumb while gripping a smartphone in one hand during his ...