The common ones are: bee stings, centipede stings, spider stings, tick bites, and cryptomeria dermatitis. I. Clinical manifestations: 1. Local symptoms Bright red spots and swelling at the bite site, accompanied by pain, numbness and itching of varying severity. 2. In a few cases, systemic symptoms may appear, manifesting as generalized erythema and wind masses. In severe cases, there may be dizziness, nausea, chest tightness, etc., and even shock symptoms. Diagnosis: 1. History of poisonous insect bite and contact. 2. Bite marks and poisonous thorns at the bite site. 3, local and systemic symptoms. Treatment of bee stings: 1. If there is a poisonous stinger, it should be removed. 2, local cold and wet compresses. 3, topical antibiotic creams, glucocorticoid creams. 4, can take oral antihistamines such as Petronectin, keratan, etc.. When the pain is severe, oral painkillers such as anti-inflammatory pain, fen-phen, etc. can be taken. 5. In a few cases, erythema, wind mass and systemic symptoms should be seen in time. Glucocorticoids such as dexamethasone and methylprednisolone injection can be used systemically. If shock is present, treat as anaphylaxis. In the case of centipede stings, the sting may appear as two bleeding spots or petechiae, so it is sometimes not easy to distinguish from the tooth marks of a venomous snake bite. The bite needs to be identified in conjunction with the bite, the severity of the symptoms and the laboratory findings. Treatment is as follows: 1. Local soap and water, alkaline water rinse to neutralize the acidic venom. Topical anti-inflammatory drops or ointments such as Bactrim. 2. Local topical glucocorticoid creams. 3.Oral antihistamines such as Petronectin, Karetan, etc. can be taken. When the pain is severe, oral painkillers such as anti-inflammatory pain, fenbid, etc. can be taken. 4, local redness and swelling, lymphangitis and systemic symptoms, prompt medical consultation, to system with glucocorticoids such as dexamethasone, methylprednisolone injection. Spider stings, many patients are clinically bitten by spiders hidden in clothes or pants while wearing clothes. Some patients have severe local symptoms, typically manifesting as blood blisters, necrosis and local soft tissue swelling and sclerosis centered on the bite site, surrounded by large bright red patches with clear borders. Sometimes there is a generalized erythema all over the body. Treatment is as follows: 1. Local soap and water, alkaline water rinse to neutralize the acidic venom. Topical anti-inflammatory drops or antibiotic ointment such as Bactroban. 2. Topical glucocorticoid ointment. 3.Oral antihistamines such as Petronectin, Karetan, etc. can be taken. When the pain is severe, oral painkillers such as anti-inflammatory pain, fenbid, etc. can be taken. 4.When local redness and swelling are strong, with lymphangitis and systemic symptoms, promptly consult a doctor and give systematic use of glucocorticoids such as dexamethasone and methylprednisolone injection. 5. If there is local necrosis, ulceration and septic infection, change the medication locally and add antibiotics and blood-stasis-activating drugs. Local swelling and sclerosis that gradually softens and absorbs do not require surgical treatment. If the final inability to absorb and subside on their own, need to cut and drain, or even excision plus skin implants. 6, there is a lack of domestic spider antivenom. Tick bites, the vast majority of tick bites seen clinically have only local symptoms and require only local treatment. In a few cases, because their insects can carry viruses, bacteria, rickettsia and other pathogens, can cause systemic symptoms such as fever. Treatment is as follows: 1. In many cases, tick bites are very firmly attached to the skin and are not easily removed. Apply paraffin oil, petroleum jelly, etc. thickly around the insect body. Try to avoid forcible removal of the insect body. 2.Apply anti-inflammatory drops or antibiotic ointment topically to the wound. 3.See a doctor promptly when there is fever and other systemic symptoms. Cryptomeria dermatitis, the worm body contains strong acidic venom, stop in the skin after being killed, strong acidic venom in the local skin caused obvious irritation dermatitis, performance of local redness, swelling, on a number of dense small pustules, often in the form of flakes and stripes: 1, local soap and water, alkaline water rinse to neutralize the acidic venom. Topical anti-inflammatory drops or antibiotic creams. 2.Local alkaline solution, saline wet compress. 3.Oral antihistamines, local topical glucocorticoid creams. 4.In severe cases, systemic glucocorticoids are given. In general, most of the symptoms of poisonous insect bites and insect bite dermatitis are mild and do not require panic, only local treatment. In a few cases, when the local symptoms are serious, as well as when there are systemic symptoms, you need to pay attention and seek timely medical attention.