For the past 2.5 months my scalp has been getting bumps that itch terribly. Sometimes the scalp skin flakes off in dry little crumbs too. My scalp itches non-stop around the bumps, and itching it just leads to bleeding and scabs. Around the time it started was I switched from a keto diet to a regular balanced diet and the weather got hot and humid. I’ve tried dandruff shampoo , hemp oil, acv rinse, tea tree oil, organic shampoos , washing my hair more often /less often . What is this?