To deal with insect bite dermatitis, first we should try to clarify what bugs are causing it. In daily life, the more common ones are midges, mites, cryptomeria, spiny caterpillars, fleas, lice, bedbugs, moths, bees, etc. The following is a brief introduction to this area of knowledge. After the venomous sting of the caterpillar enters the skin, it feels itchy and burning at first, and then it feels itchy outside and painful inside, with small papules and edematous erythema around the stinging area. After the midge bite, the rash is scattered, itchy and unbearable, and the bite site appears as a wind-burst or edematous erythema, some of which can become blisters. Cryptoptera dermatitis is often caused by the stimulation of venom release due to the patient’s own scratching or patting after the midge invades the skin. 2 to 4 hours later, the skin appears dotted or striated edematous erythema, papules or blisters, pustules, with itching and burning sensation, and there can also be a small epidemic. The rash is edematous erythema, papules, some with central insect bite petechiae or dotted dark brown scabs, occurring first on exposed areas, then invading the neck of the covered part of the clothes, the neck and trunk are common, and in heavy cases it spreads all over the body, as Persistent severe itching, more so at night, often accompanied by scratch marks on the patient’s body, secondary infection. Mosquito bites, can be large or small, prevention is the first step. 1, should maintain environmental hygiene, pay attention to insect prevention and extermination; clothes, mats should be diligently washed and dried to prevent insects hide; 2, children playing outdoors, to apply anti-bite drugs; 3, if the cryptoptera and other toxic insects fall on the skin, do not pat, the application of items gently pick away; 4, children are often known to cry after the mosquito bite, can not provide a detailed and reliable medical history, if the children usually love to cry, parents may often ignore This point, resulting in untimely consultation. So, parents with children this season need to take note of this, try to let children go to those wet, unclean places to play, and keep indoor ventilation, dry. 5, in recent years, there are often reports of people being bitten by ticks. In this caution, once bitten by a tick, do not pull and pull, forcibly pull out, so as not to bury the tick head and cheek limbs broken in the skin, you should use alcohol, kerosene, mosquito coils and other methods to “anesthetize” the tick, so that it loosens its own mouth, or use liquid paraffin, glycerin to suffocate it; 6, if the affected area is found to be toxic hair, you can try to use adhesive tape The first thing you should do is to remove the poisonous sting and apply 3% to 10% ammonia or 5% to 10% baking soda topically; 7, Cryptomeria dermatitis needs to be washed with soap and water as soon as possible, then apply mint and glycocorticoid lotion or glucocorticoid cream, and if the redness is obvious or there is a vesicular surface, use 1:5000 or 1:8000 potassium permanganate solution cold and wet. The centipede sting is immediately rinsed with soapy water, sucked with a breast pump or cupping method to try to suck out the poisonous juice, local application of ammonia or baking soda water, but do not wet compress, otherwise prone to blisters, erosion or tissue necrosis, can be taken orally Nantong Ji Desheng snake medicine tablets or Shanghai snake medicine, or the drug with water mixed into a burnt, applied externally to the affected area. After the above quick treatment, you need to rush to the nearest clinic or hospital as soon as possible. On the way, you can use your hand to press the proximal end of the affected area to slow down the spread of venom, do not take it lightly! Allergic people should not use flower lotion, cool oil, windex, etc. without permission, because some of the ingredients in these drugs may aggravate skin allergic reactions and lead to contact dermatitis. Certain commonly used potions and tools are generally available at pharmacies and can be kept at home for backup.