The term eczema is broadly applied to a range of persistent skin conditions. These include dryness and recurring skin rashes that are characterized by one or more of these symptoms: redness, skin edema (swelling), itching and dryness, crusting, flaking, blistering, cracking, oozing, or bleeding. Areas of temporary skin discoloration may appear and are sometimes due to healed injuries. Scratching open a healing lesion may result in scarring and may enlarge the rash.
Dyshidrotic Eczema only occurs on palms, soles, and sides of fingers and toes. Tiny opaque bumps called vesicles, thickening, and cracks are accompanied by itching, which gets worse at night. A common type of hand eczema, it worsens in warm weather.
Eczema may be confused with urticaria. In contrast to psoriasis, eczema is often likely to be found on the flexor aspect of joints.
In some languages, dermatitis and "eczema" are synonymous, while in other languages "dermatitis" implies an acute condition and "eczema" a chronic one. The two conditions are often classified together.
The term eczema refers to a set of clinical characteristics. Classification of the underlying diseases has been haphazard and unsystematic, with many synonyms used to describe the same condition. A type of eczema may be described by location (e.g., hand eczema), by specific appearance (eczema craquele or discoid), or by possible cause (varicose eczema). Further adding to the confusion, many sources use the term eczema for the most common type of eczema (atopic dermatitis) interchangeably.
Eczema sufferers also become prone to bacterial and viral infections. These infections can bring on a whole host of new and difficult problems. Not to mention that they are still dealing with eczema as well.
What Causes Eczema?
What causes some types of eczema is clear-cut. According to skincarephysicians.com, one type of eczema, irritant contact dermatitis, develops after frequent exposure to a mild irritant such as a detergent or brief exposure to a strong irritant such as battery acid. Another type, allergic contact dermatitis develops when an allergen (substance to which a person is allergic) touches the skin. Common allergens include poison ivy and nickel. A nickel allergy is actually one of the most common causes of allergic contact dermatitis. Many everyday objects contain nickel, including coins, buttons, jewelry, and eyeglass frames.
The exact cause of other types of eczema is not fully understood. Researchers believe that atopic dermatitis develops when many factors combine. These factors include inheriting certain genes, having an overactive immune system, and having something that dermatologists call a “barrier defect.” A barrier defect is a term that means “gaps in the skin.” These gaps allow the skin to lose water too quickly. The gaps also allow germs and other things too small to see with the naked eye to enter the body.
Seborrheic dermatitis is another type of eczema that seems to develop when a number of factors interact. These factors include the person’s genes, yeast that live on human skin, stress, climate, and overall general health. Research shows that seborrheic dermatitis tends to be severe in people who have the human immunodeficiency virus (HIV). This indicates that the person’s immune system plays a role.
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