Rashes are mostly caused by the substance that irritates the skin. A rash is generally a minor problem that may go away with home treatment. In some cases a rash does not go away or the skin may become so irritated that medical care is needed. The rash usually starts after 48 hour contact with the irritating substance. Contact dermatitis may cause mild redness of the skin or a rash of small red bumps. A more severe reaction may cause swelling, redness, and larger blisters. The location of the rash may give you a clue about the cause.
Contact dermatitis is not serious, but it is often very itchy. Common causes of contact dermatitis include:
- Poisonous plants, such as poison ivy, oak, or sumac.
- Soaps, detergents, shampoos, perfumes, cosmetics, or lotions.
- Jewelry or fabrics.
- New tools, toys, appliances, or other objects.
- Latex. Allergy to natural rubber latex affects people who are exposed to rubber products on a regular basis, especially health care workers, rubber industry workers, and people who have had multiple surgeries. Latex allergies can cause a severe reaction.
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