After applying the topical treatment to your scalp, it is recommended to wait at least 4-8 hours. If you would like to brush or comb your hair as well as apply any styling products to your hair, that can be done immediately after applying the gel to your scalp. Applying excess heat directly to the scalp (e.g., from a hairdryer) should be avoided immediately after application. When blow drying your hair, please ensure that you avoid direct heat on the scalp.