Along with how to exfoliate scalp, it is important to know how often you should do it. Ideally, you need to exfoliate every 7-10 hair washes. However, if there is too much product in your hair or your condition is caused by some kind of medication you are on, then you may have to exfoliate the scalp more often, for instance, 1-2 times per week. Though, take care not to overdo it, as it is easy to disrupt your scalp’s pH balance and provoke excess oil production.