My 13 year old daughter has extremely frizzy/curly hair. She used to have beautiful curls, but then at about 11 1/2 to 12 years old it just turned to frizz. And I don't mean just a little bit of frizz or lots of curl. I truly have never seen anyone with hair like hers. Most hairdressers that I take her to say they haven't seen anything like it. She did have blood work done when she turned 13 where they checked her thyroid. Everything turned out okay there. We have to straighten it in order for it to look okay. When I google the endrocrine system and hair it is mostly about hair growth or hair loss, but not about the kind of hair you have. I need some guidance.