I know this is gross, but this is the reason why I thought I might have a thyroid problem. I let my mom wash my hair again last weekend. She got a little carried away with the scratching--catching my neck and my ear a couple of times. My hair became a nappy matted mess, and big chunks of hair came out when I tried to rinse it out. When it was all over my hair was really clean and soft--and thinned out to boot.