Photosensitivity denotes an increased reaction of the skin to ultraviolet rays or sunlight. The reaction will usually disappear within a weak or so after the offending agent and the ultraviolet rays have been discontinued. Photosensitive reactions can be divided into two groups. These are photo allergic and photo toxic. In photallergic reactions you become sensitized to a substance. Exposure to that results in severe skin reaction. Photo toxic reactions generally produce what appears to be an exaggerated sunburn. This may occur anytime there is sufficient sensitizing chemicals in or on your body and you are exposed to ultraviolet light or sunlight.
Causes of Photosensitivity
Various medications may cause generalized photosensitivity. These include diuretics, chemotherapy drugs, antibiotics, birth control bills, antihistamines, Retin A, antihypertensive medications and some anticonvulsants. Certain skin creams may also cause photocontact dermatitis.
Signs and Symptoms of Photosensitivity
Photosensitivity produces skin that is red. It may rapidly go on to blister and become swollen. This reaction occurs after what appears to be a minimal amount of exposure to sunlight or ultraviolet rays. If the photosensitivity is related to something applied to the skin, specific areas will become involved.
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Medical Content Last Updated on 07/12/2008
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