Is shampooing ever medically necessary?

For most people, there is no medical need to shampoo at all, as rinsing with water can remove dirt and dandruff. However, some health conditions can benefit from regular shampooing.

People with parasitic infections of the scalp, particularly lice, may need to use special shampoos to get rid of the bugs.

Scalp psoriasis may improve with the use of special shampoos, particularly tar products or medicated shampoos. People with specific skin and scalp conditions should discuss their ideal hair care regimen with a dermatologist.