Cryptoptera dermatitis is an inflammation of the skin caused by the cryptoptera, a beetle that is a type of herpetic beetle like the zebra moth. The herpetic substance it contains is not zebra moth, but has the same effect and can be released when the insect is pressurized. It flies out at night in summer and likes to fly near lights. The patient can crawl on the human skin, when the insect touches the skin there is a crawling sensation, the patient consciously or unconsciously taps and squeezes the hermit beetle, after 2 to 4 hours there are patches of striped erythema swelling on the skin, and there is burning pain, after about 12 hours there are blisters or pustules at the erythema, and there is bright red vesicles, serious patients can occur superficial necrosis. 1 to 2 weeks later dry and decab and heal, leaving pigmentation. Preventive measures against Cryptorchid 1. To prevent the invasion of Cryptorchid, it is best not to play bare shoulders, to hang mosquito nets when sleeping, to extinguish indoor lights, if you find bugs on the skin, do not use your hands to pinch or pat, you should pluck the bugs to the ground and trample them to death with your feet. 2, found after the cryptoptera dermatitis should be flushed with soap and water as soon as possible; cryptoptera dermatitis lesions will not ulcerate to the dermis, if no infection occurs, 7-10 days will automatically heal scab, generally will not leave a scar. 3.Improve campus sanitation and remove weeds. Diligently dry bedding (such as brown mats, mats, cotton wool, etc.), especially when returning to school during the holidays, attention should be paid to the hazards of cryptoptera. 4. Spray trees and lawns with medicine during the peak season of cryptoptera activity. Teach students not to study or rest under streetlights with weeds.