My scalp is always itchy and I have dandruff

lexy7707

For a while now, my scalp will get super itchy 1-2 days after washing it and when I scratch it, I get this white creamy gunk under my nails. I also have a lot of dandruff, so whenever I scratch, it gets all over my shoulders and clothes. I've tried dandruff shampoos but quit using them a while ago. Now I just started the devacurl treatment so I wouldn't want to try something harsh that would contradict it.