I just was diagnosed with scalp psoriasis. It is an autoimmune disorder and it isn’t uncommon to develop more than one. I would check to see if it is alopecia. I haven’t started my treatment yet but doctor prescribed steroid and special shampoo.

Idk if you've tried this but I use tar shampoo mines prescription but you can get it with out you get your hair damp massage in the tar shampoo let it sit for about 30 mins then rinse it out flow up with conditioner at just the ends of your hair. As far as growth goes if you cat get stuff with folic acid in it that's your best bet I started taking women's vitamins and my hair has grown faster.