Although it is generally believed that 10% to 15% of the adult population suffers from chronic insomnia, and an additional 25% to 35% have transient or occasional insomnia, prevalence estimates vary because of inconsistent definitions and diagnostic criteria.
What is Seborrheic Dermatitis? 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. The exact cause of seborrheic dermatitis is unknown, although genes and hormones play a role.
âEczemaâ is a term for many kinds of skin problems. Atopic dermatitis is the most common kind of eczema. Other types include: 1  Allergic contact eczema. 2  The skin gets red, itchy, and weepy because it touches something that the immune system knows is foreign, like poison ivy.3  Contact eczema.Eczemaâ is a term for many kinds of skin problems. Atopic dermatitis is the most common kind of eczema. Other types include: 1  Allergic contact eczema. 2  The skin gets red, itchy, and weepy because it touches something that the immune system knows is foreign, like poison ivy. 3  Contact eczema.