Normally, dermatologists warn against shampooing your hair every day, the concern being that you’ll strip the scalp and hair of natural oils and cause irritation. Dandruff poses the opposite problem. “Not shampooing enough will only make your dandruff worse — it causes more oil and dead skin cells to accumulate on your scalp, which the yeast and fungi just continue to feed on. Coal Tar. Shampoos that use coal tar as an active ingredient are aimed at 'thick crust' problems Coal tar belongs to a class of drugs known as keratoplastics. It works by causing the skin to shed dead cells from its top layer and slow down the growth of skin cells. This effect decreases scaling and dryness. Coal tar can also decrease itchiness from these skin conditions. How to use Anti-Dandruff Shampoo: use on the hair and scalp only. To avoid irritation, do not let this medication come into contact with your eyes, nose, mouth. If you do get the medication in those areas, flush the area with cool water for 15 minutes. Do not apply to broken or infected skin unless directed by your doctor. Wet hair/scalp thoroughly. Apply a generous amount of K TAR shampoo and massage into a lather. Allow lather to remain on scalp for several