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 OTHER NAMES
Solar hives,
Lucitis.
DEFINITION
It is a hives caused after the exhibition to the light. It is rare, and it usually present in young adults. The initial symptomatology is the itching, continued of habones located in the radiated area that they appear to a few minutes of the exhibition and persist for some hours, disappearing without leaving residual injuries.
DIAGNOSIS
The case history is very important: age of beginning, familiar history of photosensibility, seasons with symptoms, necessary duration of the exhibition, latency between exhibition and beginning of the clinic, description of the eruption and of his distribution, resolution time if the exhibition is avoided, used solar protectors, medicines that have taken, local applications of cosmetic products, professional exhibition (arches of welding, laser, lamps GRAPE, industries, etc...) and others.
TREATMENT
- The best treatment is the prevention, which in this case consists of remaining to cutlery, remembering that the beams GRAPE can penetrate the glazing (in general, 320 do not leak wavelengths> nm) and that the clouds are not a solar protection factor.
- Also, the direct exhibition to the sun of the evening is less dangerous than in view of a cloudy midday. The white light of the fluorescent ones can cause problems only to the very sensitive patients, depending on his proximity.
- The clothes do not offer an entire protection, then, according to the type of textile, his thickness and color can allow the step of bogeys of light: waves of long wavelength (beams GRAPE and visible light) can cross thin nylon textiles or cotton.
- The factors of solar protection only offer an increase in the tolerance time to the solar beams (especially for beams UVB), but in fact they can allow to take a normal life. They are demonstrated useless in wide bogeys of action and to leak beams GRAPE and visible light. In these cases the titanium dioxide can be effective. The protection factors must apply 30-45 to themselves min before the exhibition begins to the sun, being eliminated by the perspiration and the water.
- In case of recognizing a medicine or substance like person in charge, his retreat does not imply the immediate disappearance of the photosensibility, which can persist during any time.
- As local treatment local corticoids can be used.
- In the systemic treatment the beams PUVA, medicines have been used antimalaricos, betacaroteno and antihistamine.
LIGHT POLYMORPHOUS ERUPTION
It is characterized by abnormal simple-minded reactions to the beams UV of the sun, being evident in the shape of varied injuries: eritema, pápulas, badges and vesicles.
In every patient, the eruption is accustomed to being constantly of only one presentation, being the most frequent the papulosas and papulovesiculosas. It is the most frequent solar exanthema, with predominance in the feminine sex. It appears to the beginning of the period of the sun (spring) and he is accustomed to improving on having acquired tanned.
18 begins at 24 hours after be exhibiting to the sun during some minutes or several days, and it lasts approximately 7-10 days. Often, the exposed areas do not fall ill and yes, on the other hand, the trunk, neck and breast, or the extremities.
The diagnosis and treatments are based on the same beginning as on the solar Hives.
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