In that state, I found that the repeated thumb motions of playing controller-based games gave me some tennis elbow, so maybe yours has been caused similarly.
mm, it's possible
JOExHIGASHI posted...
Do you play tennis?
no
Count_Drachma posted...
Did you happen to notice it while watching anything in particular?
not that arm
see my gundams here
https://imgur.com/a/F7xKM5r
updated 4/07/24; hg dantalion