As summer arrives and people’s outdoor activities increase, more and more people are being stung by the cryptomeria, a disease that can easily be misdiagnosed. It is common for the cryptomeria to be more active in the summer and autumn after rain and sultry weather, and to fly around lights at night. The mechanism of the disease: the insect contains a strong acidic venom (PH1-2), when the skin is exposed, the insect falls on the skin, when it is tapped or crushed, the venom stains the skin and causes skin damage within a few hours. Clinical manifestations: It often occurs on exposed areas such as the head, face, neck and limbs, and the lesions are edematous erythema with small papules or pustules, often arranged in strips, sheets or clusters, with self-conscious discomfort such as burning pain and slight itching. Treatment: 1. Local treatment: (1) wash the wound with soap and water, soda, and disinfect with local disinfectant water; (2) apply cold compresses to reduce swelling and pain, and generally do not use ice directly on the wound; (3) you can use topical glyburide lotion or glucocorticoid cream. (2) Systemic treatment: (1) anti-allergy and anti-infection treatment; (2) Chinese medicine external treatment: Yinhua, forsythia, scutellaria, horsetail, dandelion, zihua ditin, etc. decoction for external washing. Prevention: (1) pay attention to environmental hygiene; (2) reduce brightness indoors and do not sleep under lights; (3) close screen doors and windows; (4) do not pat if the insects are on the skin, if pat should be rinsed early.