Skin rashes are unpleasant reactions resulting from contact with a number of offending agents, such as plants, cosmetics, jewelry and skin-care products. The side effects of these skin irritations include redness, itching and inflammation. These types of skin rashes typically resolve in 2 to 4 weeks, according to the Mayo Clinic.
Redness
Usually the first visible sign of a skin rash is redness that appears in patches on a particular part of the body. For rashes that appear on the face, consider a reaction to cleansers or cosmetics. When rashes appear on the arms or other areas of the body, a reaction to laundry detergent or soap may be the cause. Contact with poison ivy, poison oak or other poisonous plants can cause a widespread rash. Persons sensitive to these plants will also be susceptible to rash if they come into contact with objects such as clothing, pets or garden tools, that carry the plant residue.
Itching/ Scarring
Perhaps the most bothersome side effect of a rash is itching. Itchy rashes can cause chronic irritation, leading to excessive scratching and damage to the skin, as bacterial infections or scarring are possible. To avoid injurious scratching, the Mayo Clinic recommends trimming your fingernails, wearing gloves at night or covering the rash. Taking cool baths and applying cool compresses to irritated areas are other ways to relive itching. In severe cases, medication may be needed. Over-the-counter anti-itch lotions, hydrocortisone creams and oral antihistamines can be helpful.
Inflammation
Inflammation is another side effect resulting from a rash. Inflammation generally appears in the early stages of a rash, causing the skin to swell. Skin rashes that occur frequently, causing inflammation of the skin, can be a result of eczema. According to the American Academy of Dermatology, the National Institutes of Health estimate 15 million people in the United States have some form of eczema. Eczema sufferers often experience inflammatory responses to substances, leading to rashes in various places on the body. These rashes are not contagious, however. For more on eczema, see Resources.
