Hello, and welcome to Neuro Talk. I would like to suggest you google up Aleopecia areata. The blad spot and change of hair texture can sometimes be attributed to this condition. Aleopecia can be triggered by a virus, or something that triggers the fight to flight responce. It is where your T & B lymphocytes are called out to fight, but they forget where they are going and attack you, as a foreign object. I have this disorder. Since I was 29, my hair would fall out, then maybe 9 months latter come back in like normal. There are three forms of this condition. Aleopecia areata, aleopecia totalas, and aleopecia universalis. The first one, you will get some bald spots, and change of hair texture. It will grow back and resolve in a matter of 9 months or so. The other two you don't want, as the prognosis isn't so good about getting your hair back.
A dermatologist is the type of doctor that can DX for sure. There are treatments for it, but none that I know of that have a permanent fix. My ex had a mild form of this, got it once, and it never returned.

I don't know if RSD, or CRPS can act as a trigger for aleopecia. In my case, I had a severe virus and a hosptial visit. On the ER table, my scalp hurt, and I wondered at that time if something wasn't wrong. I was DX'd at Mayo, as I actually had the worst form of the disease, and followed with a trial study for 9 years. My hair comes and goes over the years.

I hope that you don't have this disorder. I just wanted you to know one possible explaination, and suggest you go to a dermatologist to get some information. It has been years since I looked into new treatments, so there may be something by now that helps. I wish you all the best. ginnie