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Dandruff aka Seborrheic Dermatitis
What is it?
Considered a chronic form of eczema, seborrheic dermatitis appears on the body where there are a lot of oil-producing (sebaceous) glands like the upper back, nose and scalp.
With dandruff, the cause is too much oil on your scalp along with an overgrowth of yeast, called Malassezia, that's already on your skin. That excess oil causes skin cells to build up and then shed.
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Common triggers for seborrheic dermatitis include:
stress
hormonal changes or illness
harsh detergents, solvents, chemicals and soaps
cold, dry weather
some medications, including psoralen, interferon and lithium
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