Illustration copyright 2000 by Nucleus Communications,
Inc. All rights reserved. http://www.nucleusinc.com
Many
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
larger blisters.
Common causes of contact dermatitis
include:
- 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
lotions.
- 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.
| By | Healthwise Staff |
|---|
| Primary Medical Reviewer | William H. Blahd, Jr., MD, FACEP - Emergency Medicine |
|---|
| Specialist Medical Reviewer | H. Michael O'Connor, MD - Emergency Medicine |
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| Last Revised | May 11, 2012 |
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