Actinic dermatitis-What is actinic dermatitis?
Solar dermatitis, commonly known as sunburn. Summer common, so the people would prevent a good spring in recent years due to people not pay attention to guard against ultraviolet rays, the disease is increasing year by year in the number. Generally within a few hours after exposure, the exposed parts of skin irritation or blisters or bullae.Solar dermatitis, allergic reactions occur in the exposed parts of the skin caused by the light.Actinic dermatitis mechanism for the formation of the antigenic material, so that the body to allergens, cause allergic reactions when the skin tissue by light irradiation.Solar dermatitis color light susceptibility, more common in women.
Actinic dermatitis - the cause of
Actinic dermatitis, solar dermatitis, is caused by exposure of the body due to the exposed parts of the skin due to excessive exposure of the sunlight, skin acute phototoxic reaction. Actinic dermatitis occurred during the hot summer, in medicine, according to the characteristics of the skin into blisters after sun exposure, known as the "sun and sore. Western medicine, according to the pathogenesis and clinical manifestations of different, but also into the sunburn and polymorphous light dermatitis.
The so-called sunburn, by the excessive irradiation of the ultraviolet in sunlight, causing skin irradiation site of the acute inflammatory response. Due to the ultraviolet role superficial, only performance in the epidermis of the skin. Strong radiation and sunlight will soon cause skin epidermal keratinocyte necrosis, and release media resulting in dermal blood vessels to dilate, causing tissue edema. Followed by melanocytes in the strong sunlight irradiation to accelerate the synthesis of black pigment, so that was the sun darkened skin. Sunburn more than 4-6 hours in the sunlight after a strong irradiation in the exposed skin erythema boundary, there may be severe edema,12-24 hours to reach the peak. Accompanied by partial burning or tingling, and some may lead to local itching. In more serious cases may cause systemic symptoms such as fever, headache, nausea, vomiting and so on.
Polymorphous light dermatitis, manifested as exposure of the body, such as face, neck, forearm extensor side, the back of the hand, different shapes of erythema, papules, wheal or blister appears. This performance of the most characteristic is the sun and heavier, then reduce the dark.
Actinic dermatitis - clinical manifestations
Solar dermatitis of the disease is often the first time in the spring by the strong sun after onset. The bags now for the face, neck, forearm extensor side, arms and other exposed parts of erythema, papules, groups like the wind, or blisters rash. The pleomorphic refers to the rash often in different patients of the same, showing pleomorphic certain patients, rash morphology is often the single.
Small papules and Confucius herpes the most common, a small number of patients presented with erythema, edema, or plaque. Lesions and day m irradiation is closely related to each irradiation, skin lesions significantly increase the itching intensified. Appropriate dark better. The rash often recurrent, long time, moss-like change in pigmentation. Gradually reduce the general to the autumn after the spring relapse in the coming year, sustainable for many years.
Lesional skin burning, itching or tingling. Light 1 to 2 days of rash gradually subsided, desquamation or left varying degrees of pigmentation; weight may be associated with the type of flu symptoms such as fever, fatigue, general malaise, about a week or so can be restored.
Actinic dermatitis - diagnostic methodsA few hours to more than 10 hours after sun exposure, by drying the skin clear boundary of the edema and erythema, severe cases there may be blisters, the affected area of the burning or tingling. Symptoms often reached a peak within 24 hours, erythema, edema subsided after bran-like or large areas of desquamation, mild pigment calm. In severe cases, may be associated with headache, palpitations, nausea, fever and other systemic symptoms.
Actinic dermatitis - damage the bodySolar dermatitis sunlight, including ultraviolet, visible and infrared, and UV damage to the human table. UV is divided into short-wave ultraviolet light (wavelength 180-290nm), UVB (wavelength 290-320nm), UVA (wavelength 320-400nm). Different wavelengths of purple money line, the different tissues of the skin layers can be absorbed. Wavelength longer the penetrating ability of the stronger. UVB is absorbed by the epidermis, damage the epidermis; UVA can reach the upper dermis, can function in blood vessels and other tissues.
In nature, the absorption and scattering of the air, clouds, dust, water vapor in the atmosphere can filter out short-wave ultraviolet light, so that the human body from harm, while UVA only play a role in individuals with light-sensitive, so harm to human body's largest ultraviolet.
Sunlight acting on the cause of abnormal reaction of the body is divided into two kinds of light toxicity and allergic.
Solar dermatitis, phototoxic reaction is a non-immune reaction, anyone can suffer. By strong insolation local, short period of time will produce erythema, edema, blisters and other skin lesions; long-term repeated by the strong sunlight, ultraviolet irradiation, can lead to skin folds, relaxation, the surface is dry, rough or atrophy, the occurrence of pigment calm or decline. Light abnormal response is an autoimmune reaction. The body as long as there is a small amount of light-sensitive material by ultraviolet radiation that would occur in the reaction, the pathogenic spectrum UVA, even migrating to visible light, ultraviolet wavelength of 400nm or more. The clinical features of light allergy occurred in only a small number of allergic people, And, when the first contact of the light-sensitive material and solar radiation will not occur in a short time the inflammatory response, while there is a certain degree of sensitization of the general take 1-2 days or longer to react. Skin lesions began in the illuminated parts of which could later be extended to the is not light skin. The lesions manifested as redness, wheal or pimples, blisters. The clinical toxicity of the difference between light and abnormal light response is more difficult, and some patients may be phototoxic reaction, but later changed the characteristics of a light allergy, and even these two types of reactions are sometimes exist.
The phototoxic reaction or allergy light, human skin as well as the body with varying severity of injury caused by diseases collectively referred to as light dermatosis. The summer of the more common the closer the light and beauty relations dermatosis, sunburn, photosensitive dermatitis, polymorphic light eruption.
Actinic dermatitis - treatment principles
Solar dermatitis, actinic dermatitis treatment, it is best to go to the hospital clinic. Take topical drug therapy, to anti-inflammatory, to appease the pain principle. General Waicha calamine lotion or oscillation lotion can. In severe cases, topical ice milk every 23 hours, wet compress 20 minutes until the acute symptoms subside, or wet dressing with acetic acid solution. After topical corticosteroids cream significantly reduce local swelling and heat pain. Itching to add services antihistamine drugs Katsutoshi systemic symptoms of oral antihistamine and a small amount of sedatives. And given rehydration and other symptomatic treatment. Particularly important to prevent re-exposure.
Solar dermatitis, the light can take the following processing:Only erythema without blisters, or small blisters rupture by 30 grams, can be used dandelion, wild chrysanthemum 20 grams or raw Burnet, purslane, 30 grams each decoction, cold wet compress 30 minutes each day 3-4 times. One a day, used to alleviate the symptoms or more. Or coated with three yellow lotion 1-2 times a day. (Three yellow lotion system of law is to take the rhubarb, Cork, skullcap, flavescens equal parts of research to fine, take the end of 15 grams, add distilled water to 100 mm long, medical carbolic acid 1 ml.) If the burning than the very and accompanied by fever, thirst, urination short red and other symptoms may be below the fill a prescription decoction to drink: forsythia, Silver Flower and Leaves, Artemisia annua, Artemisia capillaris, Dan 15 grams of gypsum, habitat Rhizoma Imperatae 30 grams, 10 grams of gardenia. 1 day, 2 times service.
Swelling significantly, and large blisters, ulceration, the available milk liquid (milk and water, 10:1) or saline (1 teaspoon of salt dissolved in 500-600 ml of water) wet dressing every 15-20 minutes, every three hours, continuous treatment of bullous dry. Or equal parts of Cork, indigo research to fine tune into a paste with sesame oil coated surface of the skin, 2 times a day. Systemic symptoms, oral administration of the following prescriptions: 10 grams of gentian, skullcap, Cork, purple grass, 15 g of bacteria Chen, Gentiana, to the small, six a casual, purslane, habitat, 30 g. Day 1.
Solar dermatitis, sunburn is more severe, especially with nausea, vomiting, palpitations and other systemic symptoms, not allowed to deal with, to go to hospital for treatment. Induced pigmentation, vitiligo, and other patients have to go to hospital.
Actinic dermatitis - prevention methods
Actinic dermatitis in summer 6-8 month 10-14 is the most intense time of ultraviolet radiation in sunlight, ultraviolet B is the culprit to cause dermatitis, and you should avoid going out. You must go out, wear long-sleeved pants (light color), wearing a straw hat or parasol, and the effect is quite good.
Enhance skin nutrition, usually eat fresh fruits and vegetables, moderate to eat fat in order to ensure sufficient flexibility of the skin, enhance skin vitality of anti-wrinkle, vitamin C and B12 can prevent and weakened UV sensitive, and promote the regression of melanoma. and recoverability of the elasticity of the skin, so the summer should eat foods rich in vitamins.
Rich in vitamin drug prevention: can oral nicotinamide, beta-carotene, B group vitamins and so on. Onset of dermatitis, oral hydroxychloroquine, thalidomide (pregnant women hanged). The processing of local lesions, sunburn can be used calamine lotion or ice water wet dressing; chronic actinic dermatitis may be appropriate topical steroid ointment and cream, delicate facial skin, the option to use oral or topical drugs, must be under the guidance of a doctor.
Appropriate skin massage, massage can promote skin tissue metabolic function and may enhance the ability of skin resistance to hyperpigmentation, skin youthful.
Injury, it is best treated with sunscreen "for effective sun protection. The sunscreen is anti-ultraviolet paste by blending the ordinary cosmetics. Sunscreen principle First, the ultraviolet light reflected back, the second is to filter out ultraviolet rays. The use of effective time of the sunscreen SPF SPF8, SPF16, etc. The higher the number the longer the sun time.
When they go out to Yichuan red clothing, prevents ultraviolet hazards. UV in the Sun "seven-color spectrum in the lowest level, the shortest wavelength, the farthest away from the infrared light, it is easily the longest wavelength red acceptance and absorption.
