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ALLERGIC DERMATITIS - Contact dermatitis is a red, itchy rash caused by direct contact with a substance or an allergic reaction to it. -The rash isn't contagious or life-threatening, but it can be very uncomfortable. -Many substances can cause such reactions, including soaps, cosmetics, fragrances, jewelry and plants. -To treat contact dermatitis successfully, you need to identify and avoid the cause of your reaction. If you can avoid the offending substance, the rash usually clears up in two to four weeks. You can try soothing your skin with cool, wet compresses, anti-itch creams and other self-care steps. Symptoms Contact dermatitis usually occurs on areas of body that have been directly exposed to the reaction-causing substance — for example, along a calf that brushed against poison or under a watchband. The rash usually develops within minutes to hours of exposure and can last two to four weeks. Signs and symptoms of contact dermatitis include: • A red rash • Itching, which may be severe • Dry, cracked, scaly skin • Bumps and blisters, sometimes with oozing and crusting • Swelling, burning or tenderness