Our body’s response to bites and stings is caused by the excitation of toxins or allergens injected into the body by aggressive organisms. Their toxicity is often divided into two types: direct toxicity and indirect toxicity. The so-called direct toxicity is caused by the venom that is exposed, irritated hair, and secreted saliva. Indirect toxicity can be caused by inhalation or ingestion of debris, particles or excrement, etc. Stings are mostly caused by insects of the Hymenoptera family, including bees, wasps, and ants. The venom of Hymenoptera insects contains 5-hydroxytryptamine, kinin, acetylcholine and bee toxin, and stings from them can cause pain, itching, flushing and a variety of edema, and in some allergic patients can cause systemic allergic reactions and even fever. With people’s love for pets, bites in China are mostly animal bites, including spiders, snakes, dogs and cats. Cat bites are more likely to transmit disease than dog bites, which are more common. The most serious and fatal bites are those of venomous spiders and cobras. They often begin with fever, chills, sweating and painful spasms 15-60 minutes after the bite, and within 4-8 hours severe local pain and swelling can occur, with more severe reactions of respiratory distress, oliguria, hematuria, and finally death from respiratory failure or kidney failure. In summer, outdoor and field workers, it is important to strengthen protection. In case of emergency and serious cases of bites or stings, seek medical attention quickly.