A hair dandruff shampoo is a type of shampoo specifically formulated to treat dandruff, a common scalp condition characterized by flaking and itching. Head & Shoulders is a popular example of a hair dandruff shampoo.
Dandruff shampoos are important because they help to control the growth of the fungus that causes dandruff, reduce inflammation, and soothe the scalp. One key historical development in the treatment of dandruff was the discovery in the 1950s that zinc pyrithione, an antifungal agent, was effective in treating the condition.