I have oily scalp and I have had dandruff while I was in middle school, which also tend to give me scalp bumps and pimples not to mention the cause of my forehead pimples 😪😪😪😪
well back to the question, my mom started applying homemade vinegar dilluted with water having a pH around 4.5, once a week for not more than 30minutes which was followed by oiling my hair the following day. And I no longer get that severe dandruff ever.
Now there are many exfoliating pre-wash packs and shampoos available in the market which has BHA, AHA, or PHA.
Miracle toner by Some by Mi can also be used on the scalp.
The natural pH of the scalp is almost that of your face but the pH of your hair tends to be lower than that of your scalp. Also, the type of hair you have will also contribute to the pH of your scalp and hair.
The more curly your hair is, the lower the pH of your hair is .