An acute and widespread temporary reddish eruption on the skin. A rash can develop in individuals that are sensitive to a particular drug, prescription or nonprescription. The rashes are characterized by itching of an intensity that can interfere with sleep or normal activities. The rash results from the entire body reacting to the drug itself and usually develops early in treatment rather than after the drug has been taken for a period of time.
The most common causes of rashes today are: allergies, (ex. allerfic reaction to: foods, animeals, dyes, medicines, insect stings,etc), skin contact with an irritant, infection or reaction to a vaccine, skin diseases such as eczema or acne, autoimmune disorders such as psoriasis, cancer or other disease, pregnancy and, exposure to sun or heat.