Summer nights are also so hot, Old Li does not like to hide at home blowing air conditioning, but most love to make a pot of tea, shaking a fan, listening to the radio, sitting on the balcony of their homes blowing wind. An ordinary night, old Li is leisurely tea, suddenly felt a small insect flying, crawling to their necks. At this time, the old Lee did not care, with a hand on the neck, and then wipe the bug away. This pat, a wipe can not matter, after a while, the neck felt the same burning pain, and intolerable prickly feeling, a look in the mirror, good guys, a large area of skin reddening, not long old Lee’s neck began to fade, out of many small blisters, itching pain. What’s wrong with old Lee? Suddenly got this strange disease. When he went to the hospital, the doctor told him that he had cryptomeria dermatitis, which is caused by a small insect called poisonous cryptomeria. This small bug is similar in size to ants, only less than a centimeter large, usually live in the parks, green belts, grass around us, to small bugs, rotting things as food. They hide under rocks and tiles during the day and come out at night. How can such a small bug, which seems to have nothing to do with people, become the culprit of dermatitis? It turns out that this unattractive little bug has a big secret hidden inside its body: a chemical weapon with great lethality. The poisonous cryptomeria does not bite, and there is no poisonous needle that can sting, but its body has a strong acidic toxin, PH value can reach 1 ~ 2, once the body is squeezed, the venom will flow out, human skin contact will be corroded, followed by skin redness, stinging, itching, erosion, crust and scales, blisters and other symptoms, a few weeks to get well; after healing will have a certain period of pigmentation After healing, there will be a certain period of hyperpigmentation, which affects the beauty; entering the eyes may also lead to blindness. How should such a fierce bug be identified? Hot nights, especially after rain showers, are a time of high activity for cryptophids. Cryptoptera have phototropism, so they will be attracted by the lights in your home and fly over, first flying around the lights and then falling down afterwards. At this time, you can observe that this small bug of less than one centimeter has a slender body with orange-red and blue-black coloring all over, and when it falls down, it will receive its membranous wings into its body and can quickly crawl on various surfaces. The constant twisting around of the tail is one of the major features of the cryptomeria, which can be distinguished from other small insects such as ants. When you see this bug landing on your body, you should never directly shoot or pinch it with your hands, which is likely to be like Old Lee, who was made to suffer by this little guy. Rather, it should gently blow it away. In case of accidental contact with the venom, you should not touch the place with the venom to other parts of the body, otherwise it will also cause dermatitis. You should wash the affected area with water or alkaline soap and water, and then go to the hospital to explain the situation to the doctor and deal with it in time. You should not rub ointment or scratch the affected area with your hands to prevent secondary infection and leave indelible scars. How to prevent poisonous cryptophid? First of all, do not use too strong lights at home, install screens with high mesh for doors and windows to prevent cryptoptera from flying into your home; check your bed for bugs before going to bed. At the same time, try to avoid the light in the cool, when possible, spray anti-mosquito water or mosquito incense around the point. In high incidence areas can be cleared of weed breeding sites in the community, while the use of chemical agents to kill.