Well, according to me, you first need to identify to find out the exact cause of your scalp itch. If you come to know the exact reason, then it'll be easy to treat your scalp itch by addressing that particular reason.
No worries if your dermatologist hasn't told you about the exact cause for your itch, I'll tell you a few of them. There are possibly two reasons for scalp itch:
1. The first one is your hair product choices. Some hair products dry out the scalp and lead to intense itching if you don't moisturize. Switch to more holistic and natural hair products that don't have so many chemicals in them.
2. The second reason is that you may be suffering from scalp issues like dandruff, folliculitis, scalp psoriasis, and scalp eczema. These conditions cause dry and flaky skin on your scalp which directly contributes to itching.
Do you have dandruff or any other such condition?
By identifying and dealing with the underlying problem, you can take control of your itch. Try to figure out the reason for your itch and try to visit a functional medicine doctor who'll be able to look at your body as a whole and will be able to tell you the root cause of your health issues.
Hope this will help you