Summer talk UV

Summer talk about UV first affiliated hospital of Chinese PLA General Hospital Dermatology chief physician Zou Xianbiao high summer sun, and it was very hot, ultraviolet radiation on people's skin in the Sun is an invisible injury. Due to the increasing deterioration of the environment of the Earth, the destruction of the ozone layer in the atmosphere, causes the Sun to the Earth's surface the increasing trends in the ultraviolet. Each 1% reduction of the ozone layer, humans will increase in the incidence of skin cancer 2%~6%. Therefore, UV burns are we each need to be concerned with the issue. Merits and credit a lot of ultraviolet UV can cause skin black, protect the skin and deep tissue injury. At the same time, UV can cause skin and subcutaneous tissue to generate vitamin d and vitamin d is to maintain the calcium and phosphorus metabolism in human normal and necessary for the normal growth of the bone substance. In addition, UV also has enhanced human immune function, improving tissue oxidation process and excitement of the sympathetic nervous system function. Harmful ultraviolet also had bad news, in addition to can result in formation of spots on the face, can also cause skin deep injury, can directly reach the skin dermal layer, destruction of collagen and elastic fibers, accelerated skin aging, make it lose elasticity, wrinkles, or even lead to skin cancer. Ultraviolet in the skin, can result in destruction of epidermal cells, stimulating nerve endings, by reflex-induced cutaneous Telangiectasia, cause flushing of the skin, swelling, formation of erythema, delayed pigmentation, and long-term exposure can make skin thickening of the skin. Summer easy occurs skin Sun injury summer, in outdoor activities time more long of people easy Sun injury, performance for bare of skin appears diffuse sexual of erythema (is Sun spot), skin itching, and has hot pain sense, sometimes will swelling, serious of skin can up blister, even caused as headache, and nausea, and fever, and weak, and palpitations, general symptoms until heat stroke, Sun of next day skin on UV of reaction reached peak, thereafter this reaction will slowly reduce, and appears skin de chip and pigment calm. Proper sun protection sunscreen not just by smearing it all sunscreen, proper sun protection methods should be the SPF sunscreen and clothing both. In General, in the summer from 11 o'clock in the morning sun of the strongest periods, you should avoid outdoor activities. When the sun beats down, or when at high altitude, if you must go out, should wear wide helmet (3 to 4 inch) or a sunshade, can block the Sun, and dotted decoration. In the case of hot, wear long sleeved clothes as possible. As far as the colors, red and dark blue clothing and sunscreen works best, and light colors such as white, yellow, Sun protection ineffective. See June 9, 2009 Edition of the family health report of the original "medical classes"