Seborrheic Dermatitis Seborrheic Dermatitis
Wikipedia—the Free Encyclopedia
Seborrhoeic dermatitis (also Seborrheic dermatitis seborrhea) (also known as "Seborrheic eczema"skin disorder affecting the scalp, face, and trunk causing scaly, flaky, itchy, red skin. It particularly affects the sebum-gland rich areas of skin.
The cause of seborrhoeic dermatitis remains unknown, although many factors have been implicated. The widely present yeast, Malassezia furfur (formerly known as Pityrosporum ovale), is involved, as well as genetic, environmental, hormonal, and immune-system factors.[The claim that seborrhoeic dermatitis is an inflammatory response to the yeast has not been proven.Those afflicted with seborrhoeic dermatitis have an unfavourable epidermic response to the infection, with the skin becoming inflamed and flaking.
Acute form of seborrhoeic dermatitis on scalp Another example of seborrhoeic dermatitis on scalp Another example of seborrhoeic dermatitis on scalp
In children, excessive vitamin A intake can cause seborrhoeic dermatitis.Lack of biotin, pyridoxine (vitamin B6)[ and riboflavin (vitamin B2)[ may also be a cause.
In adolescents and adults, seborrhoeic dermatitis usually presents as scalp scaling (dandruff) or as mild to marked erythema of the nasolabial fold during times of stress or sleep deprivation.