This form of the disease occurs on areas of the skin exposed to the sun; the condition becomes evident within minutes of exposure. After the individual is no longer exposed to the sun, though, the condition starts to weaken within a few minutes to a few hours, and hardly ever lasts longer than 24 hours. Solar urticaria is classified into six different types, depending upon the wavelength of light involved. Since glass absorbs light with a wavelength of 320 nm and below, people suffering from solar urticaria in response to wavelengths of less than 320 nm are protected by glass.
Other articles related to "solar urticaria, urticaria":
... Solar urticaria was first identified by P ... Just a year later, in 1905, Ward became the first to induce urticaria through exposure to the sun in a controlled environment ... The name "solar urticaria" was proposed in 1923 ...
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