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. Who gets seborrheic dermatitis and why? Seborrheic dermatitis can affect people of any age, though it’s most common in infants and adults between the ages of 30 and 60.
https://nationaleczema.org/eczema/types-of-eczema/seborrheic-dermatitis/

