While researchers still do not know what the exact medical causes of eczema are, it is known that eczema usually occurs when a person possesses a certain inherited immunoglobulin of the IgE type, which in return causes an inevitable allergic reaction on the skin. There are currently numerous known types of eczema, but the most common are Atopic Dermatitis, Contact and Seborrheic eczema. Atopic Dermatitis is commonly characterized by inflamed and itchy skin. Some researchers believe that this may be caused by the body's immune system functioning abnormally. Contact eczema is more localized and occurs when the skin comes into contact with an irritant, causing redness, itching, and burning. Seborrheic eczema's causes are still unknown; however the known symptoms often include scaly, yellowish, oily patches of skin. These irritations are usually located on the scalp, face, and on some occasions other parts of the body. Researchers have yet to determine a complete cure for eczema however they are aware that certain external triggers can cause the eczema to become inflamed and there are certain things that can be done to reduce the flare ups caused by these triggers. Some of the most common triggers of Eczema would include toiletries, stress, and types of clothing material. Read On Medical Causes For Eczema