By treating both oily and dry dandruff, anti-dandruff shampoo lessens the sensation of dryness and itching on the scalp.
Its antifungal compound, which includes zinc, pyrithione, and piroctone olamine, inhibits the growth of Malassezia yeast, which is the primary cause of dandruff.
Salicylic acid gets rid of scales.

When the scalp is cleaned without drying out, irritations and itching go away.