So I’ve been dealing with this for about 4 years now. I know it’s keratosis pilaris bc my scalp feels like sandpaper and there are small white bumps/grains that I can pick or rub off. The weird thing is I don’t have this anywhere else on my body except for my upper back a little. My hair follicles are basically clogged with hardened keratin. I tried about every scalp shampoo and clarifying wash/ exfoliation method under the sun and nothing can get rid of it. Just about 6 months ago I tried to tackle the issue internally by avoiding dairy, trying cod liver oil supplements, and various other supplements to see if it was a deficiency problem. The frustrating part is that I managed to completely get rid of the issue for about 2 weeks when I started drinking homemade carrot juice every day, but it came back. Ugh. I also thought I had done it when I started taking beef liver supplements- my scalp was smooth for days. But for some reason it always come back! Its like my body builds up a resistance to these things and manages to find a way around them to produce the plugs.