There are localized, moderately well-defined scaly red patches. The scales are somewhat oily and are coarser than those seen in psoriasis. The scaly patches usually occur between the eyebrows and on the skin fold next to the nose. They are often also visible along the hairline. In men, seborrheic dermatitis is also often seen at the level of the sternum. There is then moderately well-defined redness with scaling. The patches vary in size from 1 to as much as 10 centimeters.
Symptoms
- Red skin
- Yellow or white scales
- Itching
- Rash in areas of high sebum production, such as the scalp, face (especially around the nose, eyebrows, behind the ears) and chest
- Oily skin patches
Causes
- A yeast called Malassezia that lives in the sebum of the skin
- Genetic predisposition
- Hormonal changes or certain medical conditions can increase the risk of developing seborrheic dermatitis
Diagnosis
The diagnosis of seborrheic dermatitis is usually based on the appearance of the skin and a physical examination. Additional tests, such as a skin biopsy, may be performed in some cases.
Treatment
- Anti-dandruff shampoos for the scalp
- Antifungal creams or shampoos for the skin
- Corticosteroid creams for inflammation and itching
- Ultraviolet light therapy in some cases
Self-care Tips
- Gently wash affected areas with a mild, soap-free cleanser
- Regularly use medicated shampoos if the scalp is affected
- Avoid using styling products that can irritate the skin
- Limit exposure to extreme cold and heat
- Wear clothing made from natural, breathable fabrics
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