Also called seborrheic dermatitis, dandruff is a common skin condition. About 11.6 percent of the general population has it, according to Thomas Berk, M.D. and Noah Scheinfeld, M.D. Among infants in their first three months, the prevalence of seborrheic dermatitis, or “cradle cap,” is 70 percent.
The symptoms are believed to result from too much skin oil being produced and irritation from malassezia, a type of yeast. This results in white skin flakes.
While many people have dandruff on the scalp, seborrheic dermatitis can occur on other parts of the body. For example, people may have symptoms behind their ears, middle of their chest, eyebrows, lips, outer ear, eyelids and nose creases.
The Cleveland Clinic notes that seborrheic dermatitis on other body areas can result in patches of skin that appear scaly, red or greasy.
So who gets dandruff?
MedlinePlus noted that seborrheic dermatitis seems to run in families.
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