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contact dermatitis

contact dermatitis is inflammation of the skin caused by contact with a substance that causes an allergic reaction. or it can occur from contact with a substance that irritates the skin. a minor case of contact dermatitis may cause mild redness of the skin or a rash of small red bumps, while a more severe reaction may cause swelling, redness, and larger blisters.

a rash usually starts about 48 hours after exposure to the irritating substance. common causes of contact dermatitis include:

  • poisonous plants, such as poison ivy, oak, or sumac.
  • soaps, detergents, shampoos, perfumes, cosmetics, or lotions.
  • jewellery or fabrics.
  • new tools, toys, appliances, or other objects.
  • latex gloves.

the location of the rash may provide a clue about the cause.

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