Seborrheic dermatitis often affects the scalp, face, and chest. It is typically found in facial creases, around the ears, around the brow, and around the hairline. Seborrheic dermatitis is sometimes confused with psoriasis because both can involve the hairline and the ears.
Often the facial skin is a combination of dry and oily when seborrheic dermatitis is present. There will also be poorly defined scaly patches on the face.
Psoriasis tends to present with white patches, but skin afflicted with seborrheic dermatitis is often multi-colored. There can be areas that are yellow, white, or pink. Ring-shaped flaky patches of skin on the scalp and chest are seen in seborrheic dermatitis.
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The armpits, genital folds, and breasts can also demonstrate patches of seborrheic dermatitis. Sometimes this condition is complicated by folliculitis (inflammation of the hair follicles). I’ve seen severe cases of folliculitis in teenage males. In these cases, there was a lot of pus evident in the infected areas.
Seborrheic dermatitis presents with minimal itchiness. If the scalp is affected, there may be a bit of an itch, but nothing compared to eczema and psoriasis.
Often this condition worsens in the winter. That’s also a pattern seen with eczema. Sun exposure and being outside tends to improve seborrheic dermatitis. Being inside for most of the day can worsen skin conditions
because the temperature isn’t quite right, and the humidity isn’t quite right. This is when you’ll see flares of skin conditions.
Sources:
- https://www.ncbi.nlm.nih.gov/pubmed/31704415
- https://www.ncbi.nlm.nih.gov/pubmed/31310695
- https://www.ncbi.nlm.nih.gov/pubmed/31396944
