Product recommendation, I would say ACV or a clarifying shampoo to ensure buildup isn't an issue.
Itchy scalp can often be caused by an ingredient(s) your scalp doesn't agree with. Keep a watchful eye. Fragrances are one that usually go under the radar. There is a preservative I noticed my scalp disagrees with.

If love is truly patient and kind, but our actions or words aren't, then maybe It's self reflection time. -Sent from my iPod touch using CurlTalk-