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rashes are caused by contact with a substance that causes an allergic reaction
(contact dermatitis). The rash usually starts within 48 hours after a person is
exposed to the irritating substance, but it may not show up for several days. A
minor case of 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
Common causes of contact dermatitis
Poisonous plants, such as poison ivy, oak, or sumac, or touching an object that has had contact with one of these plants.
Soaps, detergents, shampoos, perfumes, cosmetics, or
Jewelry or fabrics.
New tools, toys,
appliances, or other objects.
Latex gloves. 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 many surgeries. Latex allergies can cause a severe reaction.
Contact dermatitis doesn't usually occur the first time you
are exposed to the irritating substance (allergen). After you have had a
reaction to the substance, a rash can occur in response to even very small
amounts of the substance.
Primary Medical Reviewer
William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical Reviewer
H. Michael O'Connor, MD - Emergency Medicine
Current as of
March 12, 2014
WebMD Medical Reference from Healthwise
March 12, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this