What is dandruff caused by?

Depends. Dandruff is flaking of the scalp. It can be simple shedding of skin. Can be due to sun burn. Can be due to infection, inflammation or other acute causes. Mostly, however, it is due to seborrheic dermatitis. This is an inflammation of the skin often due to a low grade fungal infection or a reaction to oils in the scalp. Best treated with tar shampoos or antifungal shampoos. Maybe topicals.
Dry Skin. Most commonly dandruff is dry scalp skin. It can accumulate in the hair, and "flake" onto dark clothing. Dandruff shampoo can help control the problem. If if persists, it may be something that requires professional treatment, and you family doctor, internist or dermatologist can help.

Related Questions

What will relieve dandruff caused by accutane?

DOVE. Dove body wash, either for men or unscented. Use daily in a nice, long shower, Wash hair and entire body with it. You can also use a conditioner rinse after, but probably will not need it. Can also try Aquaphor shampoo or Eucerin body wash. There is no blood test for back pain. Maybe the Accutane causes back pain, but probably there is a different cause. Read more...

What causes dandruff?

Complicated. It is a combination of skin chemistry and physiology and one's relationship with a ubiquitous fungus. Read more...

What causes dandruff? How can I treat it?

Yeast. Dandruff is seborrhiec dermatitis in the scalp. This is due to an overgrowth of yeast named pityrosporum ovale. Some make sebum (oils) especially preferential for them to grow. If your immune system reacts to it, your skin becomes inflamed red and flaky, thus the dandruff. Start by using head and shoulder, nizoral, (ketoconazole) neutrogena tgel or tsal shampoo, lather and leave in for 5-10min before rinsing. Read more...
Dry scalp. Use a dandruff shampoo such as pert to moisturize your scalp. The dryness will go away and so will the flaking skin or dandruff. Read more...
Dandruff. Dandruff is a common scalp condition in which small pieces of dry skin flake off of the scalp. If you have dark hair or you’re wearing dark colors, you may notice the flakes in your hair or on your shoulders. Dandruff may also make your scalp itch. https://www.aad.org/public/skin-hair-nails/hair-care/how-to-treat-dandruff. Read more...

What can cause dandruff and why is baking soda + acv not working?

Use real Rx. If you insist on a "natural" remedy, then your options still include coal tar, selenium, ketoconazole, and the common blue stuff with zinc. Forget the baking soda stuff, it's an Internet claim that will disappoint you. Read more...

What causes dandruff/seb derm when you move to a new place?

Climate change. A change of climate or environment will often flare seborrheic dermatitis. Most cases can be controlled adequately with a good over-the-counter anti-seborrhea shampoo and Hydrocortisone cream. Stubborn cases require prescription products. But it will always come back and require re-treatment, because the yeast that causes it is a normal component of your skin. Read more...
Stress, climate . Moving can post many issues including stress and a change of environment. Both of these issues can lead to an exacerbation of dandruff. This is a lifelong condition that is very hard to eradicate but can be well controlled with over the counter products or if necessary, prescription grade products. Read more...

What to do about dandruff caused by sharing brush?

Dandruff Therapy. Ketoconazole shampoos (such as nizoral). Ketoconazole is a broad-spectrum antifungal agent that may work when other shampoos fail. It's available over-the-counter as well as by prescription. Read more...

What causes dandruff around a females vagina? Like on the lips

GYN. It is possible that you have an inflammation or infection. You must see a physician for a thorough female examination. I suggest avoiding any tight fitting undergarments and abstain sexually until cleared. Read more...

What causes chronic dandruff in a guy?

Could be Fungal. Chronic itching and flaking in the scalp can be many things from just bad dandruff, to a fungal infection called tinea capitis, to scalp psoriasis and more. If otc anti-dandruff shampoo is not helping, i would see a dermatologist. Read more...