I had an episode of pretty intense scalp itching that drove me crazy for a few months.
It came out of nowhere and the only thing that helped short term was a product called Scalpicin. You can find it in the drug store, buy two bottles because they are small and it’s weird to keep going back for more every few days.
My doctor thought I’d developed an allergy to my shampoo, so I switched to a different brand and that helped. Eventually it just…went away.
Good luck, if you’re suffering like I was I really feel for you.