PSA Turn off "Mouse Acceleration & Enhance pointer precision" for your Wrist.
As a gamer since 4 years old, I have to say that my wrist aches all the time today.
I went to a doctor a month ago. I said I play computer games a lot. Using mouse has damaged my wrist.
Surprisingly, he did not ask me to play less, he asked me to turn off mouse acceleration in windows control panel.
He said many patients with the similar symptoms play a lot LoL and CS:GO.
"Mouse acceleration and "Enhance pointer precision" ruin your muscle memory when it comes to precise accuracy.
In other word, MA and EPP are constantly saying "fuck you" to your wrist when you are trying to last hit that minion or headshot that AWPer.
After a month, my wrist magically feels much better. I didn't even do other exercise, but only turned that off.
TL:DR As title.