Exanthems by the Sun
It caused a rash after exposure to light. It is rare, and usually appears in young adults. The initial symptom is pruritus, followed by hives located in the irradiated area to begin within minutes of exposure and persist for several hours and left without leaving residual lesions.
Diagnosis
The history is very important: age of onset, family history of photosensitivity, with seasonal symptoms, duration of exposure required, latency between exposure and onset of clinical description of the rash and its distribution, time of resolution if have minimal exposure, sunscreen use, drugs that are taken, local applications of cosmetic products, occupational exposure (welding arcs, lasers, UV lamps, industries, etc …) and others.
Treatment
* The best treatment is prevention, which in this case is to remain under cover, pointing out that UVA rays can penetrate the glass (generally do not filter out wavelengths> 320 nm) and that the clouds are not a protective factor solar. Exanthems by the Sun
* In addition, direct exposure to the sun at sunset is less dangerous than in the light of a cloudy afternoon. The white light of fluorescent lights can cause problems only in highly sensitive patients, depending on their proximity.
* Clothes do not provide complete protection, as according to tissue type, thickness and color can allow the passage of spectra of light waves long wavelength (UV and visible light) can pass through thin fabric of nylon or cotton.
* The sun protection factors only offer an increased tolerance time to sunlight (particularly UVB), but in fact may allow a normal life. Shown useless broad spectrum of action and to filter UVA and visible light. In these cases it may be effective titanium dioxide. Protective factors should be applied 30-45 min before the start of exposure to the sun, being removed by sweat and water.
* In the case of a drug or substance recognized as responsible, its withdrawal does not mean the immediate disappearance of the photosensitivity, which may persist for some time.
* As a topical treatment can be used topical corticosteroids.
* In the systemic treatment beams were used PUVA, antimalarial drugs, beta-carotene and antihistamines.
Polymorphous light eruption
It is characterized by delayed abnormal reactions to UV rays of the sun, manifesting as various lesions: erythema, papules, plaques and vesicles.
In each patient, the rash tends to be constantly in a single presentation, the most frequent and Papulovesicular papular. It is the most common solar rash, predominantly in females. Appears at the beginning of the season of sun (spring) and used to improve the acquisition tan.
It begins 18-24 hours after exposure to the sun for a few minutes or several days, and lasts about 7-10 days. Often, exposed areas are not affected and yes, on the other hand, trunk, neck and chest, or extremities.
The diagnosis and treatment are based on the same principles as in solar urticaria.
Possibility Related Posts:
Posted in Skin Care Tips, Skin Care Treatments | 
Tags: skin, Skin and Nutritions, Skin Care, Skin Care Tips, skin disease, Skin Diseases, Skin Problems