A skin rash shows up as an area of inflammation or change in the texture, and/ or color of your skin. It can be caused by a number of different things including irritation, disease, or allergic/ non-allergic reactions to foods, chemicals, plants, animals, insects or other environmental factors.
So many rashes appear because the skin is an active player in the immune system. Antigens are things, like viruses or proteins, that we react to. These antigens need to be presented to our immune system in a very controlled way; otherwise we would react to too many things. The skin is the site at which antigen presenting cells introduce the antigens to lymphocytes. These lymphocytes are, in a sense, the paratroopers of our body. A complicated process of making sure that we are not overreacting takes place. All of this occurs in the skin. Once these lymphocytes have been activated they produce many chemicals that cause inflammation. When we become allergic to an antibiotic or other drug, the action takes place mainly in the skin as well as in the lymph glands. Viral infections also frequently produce rashes as viral particles are presented to our immune system in the epidermis. In a sense the skin is like the schoolyard where many of the fights occur.
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Rashes can appear on your entire body or be limited to a specific area. What a rash looks like and how it feels can vary depending on the cause and type. Some common types of rashes include:
eczema (also called atopic dermatitis), which is commonly seen in children. It can cause dry, chapped, bumpy areas around your elbows and knees, and can be very itchy. It can sometimes become very serious …
