Hair thinning?

Hi ladies!

I have curly hair and I’ve always noticed that the top of my hair felt thin, but for some reason it feels thinner. Im not entirely sure if it’s just the way my hair is or if it’s actually thinning. I don’t notice any bald spots or anything but I’m not sure exactly what products to use to help my hair grow either.

I use to have eczema on my scalp when I was in highschool and as a young adult. I’m 26 now and haven’t had it in 2-3 years. My hair isn’t super full in general. I do have a vitamin D deficiency which I have been on meds for! Any ideas would be helpful!