Quick, how do you hold your phone? Is the bottom of it resting on your pinkie, while you cradle the back with your index, middle, and ring fingers, and your thumb does all the scrolling? Alas, like the many other seemingly easy, intuitive things we do, it is wrong.
While the one-handed claw is seemingly the most convenient way to grip your device, over prolonged periods of time, it could be doing damage to your wrist and aggravating your ulnar nerve—among other issues.
At first, I thought this was the old iPhone antenna issue
but I have been noticing if I do a longer session at the end of the day, my pinkie gets a bit sore and I have to shift position. It may well be good to be more conscious about this issue, especially if you use your phone a lot. Maybe this is a good case for slightly thicker phones with more battery capacity, or least more ergonomic phones, instead of just smaller and smaller all the time.
See Have You Been Holding Your Phone Wrong This Whole Time?
The way you hold your phone could be damaging your thumb, pinkie, or forearm nerves.