@swurl I wouldn't be surprised if I put pressure on my hand from daily usage. I did not use my chair arms (they were up) on my work desk. I put them down, helping the pressure on my hurt arm. Ultimately I rarely had issues with the arm just due to mouse usage, I think, because I started early as a kid? 🤷

Otherwise, I definitively hurt it because I was using the mouse on the couch on a side table and probably fucked around too much. Oddly enough, I was fine doing just that for a year or two, but I guess my arm got tired and I pushed it too much

Now I have a beanbag mousepad for the couch, which should help prevent it from happening again