Dry Skin Cause Dermatitis

Dry skin, also called xerosis, is a very common skin condition that occurs at all ages. Usually, it doesn't represent a serious problem but sometimes it can be difficult to treat. Moreover, it might be correlated to other skin diseases or associated to pathological conditions such as diabetes, hypothyroidism and hyperthyroidism, Sjögren syndrome, malnutrition.
Dermatitis (sometimes called eczema) is inflammation of the upper layers of the skin, causing itching, blisters, redness, swelling, and often oozing, scabbing, and scaling.

Known causes include dry skin, contact with a particular substance, certain drugs, varicose veins, and constant scratching.
Typical symptoms include a red itchy rash, blisters, open sores, oozing, crusting, and scaling.
The diagnosis is typically based on symptoms and confirmed by results of skin tests or skin samples or the presence of suspected drugs, irritants, or infection.
Avoiding known irritants and allergens reduces the risk of dermatitis.
Treatment depends on the cause and the specific symptoms.

What Causes of dermatitis
A number of health conditions, allergies, genetic factors and irritants can cause different types of dermatitis:
Atopic dermatitis (eczema). This form of dermatitis is likely related to a mix of factors, including dry skin, a gene variation, an immune system dysfunction, bacteria on the skin and environmental conditions.
Contact dermatitis. This condition results from direct contact with one of many irritants or allergens — such as poison ivy, jewelry containing nickel, cleaning products, perfumes, cosmetics, and even preservatives in many creams and lotions.
Seborrheic dermatitis. This condition may be caused by a yeast (fungus) that is in the oil secretion on the skin. People with seborrheic dermatitis may notice their condition tends to come and go depending on the season.
Toxic substances that can cause irritant contact dermatitis include:
battery acid
bleach
drain cleaners
kerosene
detergents
pepper spray
Cause of Dry Skin
Though most cases of dry skin (xerosis) have an environmental cause, certain diseases also can significantly affect your skin. Potential causes of dry skin include:
Weather. In general, your skin is driest in winter, when temperatures and humidity levels plummet. But the reverse may be true if you live in desert regions, where temperatures can soar, but humidity levels remain low.
Heat. Central heating, wood-burning stoves, space heaters and fireplaces all reduce humidity and dry your skin.
Hot baths and showers. Taking long, hot showers or baths can dry your skin. So can frequent swimming, particularly in heavily chlorinated pools.
Harsh soaps and detergents. Many popular soaps and detergents strip moisture from your skin. Deodorant and antibacterial soaps are usually the most damaging. Many shampoos may dry your scalp.
Sun exposure. Sun dries your skin, and its ultraviolet (UV) radiation penetrates far beyond the top layer of skin. The most significant damage occurs deeper, leading to deep wrinkles and loose, sagging skin.

Other skin conditions. People with skin conditions like atopic dermatitis (eczema) or a skin condition marked by a rapid buildup of rough, dry, dead skin cells that form thick scales (psoriasis) are prone to dry skin.