Someone in our group, who we all met at my house, has severe hand and forearm atrophy due to her TOS and RSD.

I assumed it was from lack of use, but now I think it also had to do with the RSD action - as SeaP says, severe nerve damage.

I do not have atrophy per se yet - I have always had FAT arms / hands / forearems, so SWELLING is my problem.

BUT, I lost most of my arm hair, and some of my body hair with the RSD. Not so bad...huh? I like hairless...haha. But thank goodness I had THICK head hair, as now that it's thinner, it's still OK. It is a LOT thinner than before TOS. Dr. Bluestone attributed the hairloss (as did other docs) on my RSD areas due to the RSD patterns we identified. I did not know ahead of time that he was looking at HAIR LOSS, I was showing him pain areas.

Just FYI.