Another variety of allergy is represented by angioedema. In this rather special form of hives, fortunately much more rare, the allergic reaction does not occur in the skin itself but in the subcutaneous tissue. It causes swelling of the face, especially around the eyes and mouth, which can be dangerous because it can cause swelling of the pharynx sometimes responsible for asphyxiation. Finally, we need to know that some people have genuine allergy to the sun, manifested in various forms. During the first rays of the sun, or after prolonged exposure to it, develops a rash type rash that can spread on the skin and join general signs (sick). The cause is an intolerance to ultraviolet. Again, excessive production of histamine is the cause of the inflamed skin.
There eczema and eczema
Another widespread kind of allergy skin is formed by eczema. However, this term refers in fact several allergic diseases, in fact quite different. The most common of them are represented by the infant atopic eczema and allergic contact eczema in adults. It also happens that skin diseases as psoriasis, will complicate other skin alterations resembling those found in eczema as a result of the administration of allergenic drugs.