Qualities
Pyrithione zinc is an active ingredient in a number of dandruff-fighting shampoos (DHS Zinc and Head & Shoulders, for example). It is also used to treat a number of other skin conditions including eczema and ringworm. The exact way in which pyrithione zinc works is not completely understood, but it may retard the growth of bacteria and fungi on the skin.
Pyrithione zinc has both antifungal and antibacterial properties. These qualities may assist in diminishing skin inflammation common in psoriasis (patches of raised red skin with thick silvery scales) and also help curb dandruff.
Pyrithione zinc is also an antiseborrheic, and as such it may stop undue production of the sebaceous glands, which make oil to keep skin soft and smooth. These glands sit under the surface of the skin and typically are joined with hair follicles.
Effects
According to the Mayo Clinic, pyrithione zinc is sold over-the-counter to help reduce the symptoms of seborrheic dermatitis of the scalp. Seborrheic dermatitis is a common condition that makes the skin look greasy, scaly and flaky. While it typically involves the scalp, it can also develop on the face and chest and in the folds of the arms, legs and groin.
Pyrithione zinc is sold in a number of forms, including lotions, creams, bar soaps, sprays and shampoos.
Usage
When using a shampoo that contains pyrithione zinc, wet your hair and scalp thoroughly and use an amount of shampoo that will create a good lather. Rub the shampoo into your hair and scalp and let it sit for up to five minutes. Rinse out your hair and repeat the process. Always follow the directions on the product label and don't use the shampoo more frequently than recommended. Overuse can increase the chance of developing minor to severe skin irritation.
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