In summer, a new round of "concert" begins to play, "buzzing, buzzing -" the melody of summer lingers in my ears. So, what is the harm of mosquito bites? The larger the mosquito bag, the greater the toxicity? How to prevent being bitten by mosquitoes? Today, let's learn What is the harm of mosquito bites? There are two kinds of mosquito lethality: The first is to suck blood, which is less harmful. After being bitten by mosquitoes, many people will have local skin allergies, redness, swelling, pain, itching and other serious conditions, such as ulceration and infection, after scratching with hands. The second is the spread of deadly diseases, which are highly lethal. Mosquitoes rank first among the 15 most lethal animals to humans, and their annual number of injuries to humans exceeds the total number of other animals in the list. There are three genera of mosquitoes closely related to human health, namely, Culex (Culex), Anopheles (Anopheles) and Aedes (Anopheles) which have dozens of species in China. When mosquitoes ingest human blood, different types of mosquitoes will lead to different diseases and clinical features. Anopheles mosquitoes usually transmit malaria, and their clinical characteristics are fever, sweating and intermittent shivering; The clinical characteristics of Japanese encephalitis transmitted by Culex mosquitoes through biting humans are unconsciousness and high fever; Aedes mosquito can spread many diseases by sucking human blood, such as dengue fever, yellow fever and Chikungunya disease. The main vector is Aedes mosquito. The larger the mosquito bag, the greater the toxicity? After being bitten by mosquitoes, the size of mosquito packets on the body is closely related to the strength of individual immune system mechanism, and has nothing to do with the toxicity of mosquitoes. For people with strong immune system, they can get no damage after being bitten, but most people will have physical reactions. They will slightly show raised mosquito bags, and have obvious itching. Skin lesions show symptoms such as erythema, papule, and wheal. However, for people with weak immune system, especially those with sensitive constitution, a large amount of histamine and cytokines will be released after blood ingestion, followed by blisters, plaques, ecchymosis, swelling and pain. Due to the intense response to symptoms, it will take a long time to completely relieve them. In addition, scratching with hands will increase the release of histamine, an organic nitrogen-containing compound, resulting in tissue damage or inflammation, leading to local tissue edema. When you feel itching, you can apply mint cream and toilet water in time to relieve it, rather than choose to scratch. What kind of blood do mosquitoes prefer to suck? Is it related to blood type, whether blood is sweet or not? Mosquitoes are extremely sensitive to CO2, heat, volatile chemicals and other factors. Their sense of smell can quickly detect and accurately locate these substances. The secretion of these substances is closely related to personal metabolism, such as body metabolites urea, lactic acid, fatty acid, etc. Therefore, when you have a large amount of CO2 emissions, frequent sweat secretion, and vigorous body metabolism, you are more likely to be favored by mosquitoes. Mosquitoes are mainly identified by the smell in the air, so whether to recruit mosquitoes is not directly related to the blood type. Is it useful to pinch a cross with a mosquito bag? Answer: useful - psychological function, mainly using the pain transfer of the human body. Imagine pinching the mosquito bag with your fingernails. Your subconscious will feel pain and won't care about the itching feeling. In fact, the itching feeling hasn't disappeared. It's just that the pain outweighs the itching feeling. It's entirely your own psychological effect. Tips for proper handling: ① When itching, it can be neutralized with the help of alkaline substances, such as baking soda. Soapy water can be used at home to relieve itching. In addition, the use of salt water to smear or rinse the itchy area can soften the lump and achieve the effect of removing pain and relieving itching. ② Do not scratch with your hands, especially at the skin mass, otherwise tissue damage may occur and cause infection. Scratching may speed up the blood flow in the capillaries. At this time, some toilet water can be sprayed in a small range. Most of the toilet water contains alcohol. Large area use will cause alcohol allergy symptoms, especially for people with sensitive constitution. Once there is tingling, they should stop using it immediately and seek medical advice. ③ For mosquito bags on the skin, cold compress can be used to relieve the pain, such as wrapping a towel with a frozen drink floating on the affected area. External application drugs such as desonide cream and alonson cream are always available at home. ④ When the mosquito bite becomes red and swollen, apply cold compress with ice first, and then use topical drugs according to the doctor's advice, such as 1% Mint calamine lotion or 1% mint cream. ⑤ When the bite shows obvious infection, anti infection drugs such as mupirocin ointment should be used in time. If they can not be relieved, seek medical treatment in time. How to avoid being bitten by mosquitoes outdoors? Remember the three character formula of "avoid, drive and destroy". 1 - avoid For outdoor activities, try to choose light colored trousers and long sleeves, avoid grass, shade, warehouses, waterside and dark places, and avoid wearing dark clothes to keep the skin clean and non sticky. In the field, the exposed parts of the body should be coated with cooling oil, essential balm, mosquito repellent, etc. in advance. 2 - drive Choose the toilet water and mosquito repellent liquid containing DEET and imipene. When using mosquito repellent products, the "amount" of the drug is not the more the better. You can choose to use a small amount for many times during outdoor activities. picture Mosquitoes like darkness and fear light. If they are outdoors at night, they should take lighting equipment to avoid. 3 - off Since the eggs, larvae and pupae of mosquitoes live in water, their growth and development can not be separated from water. Therefore, the breeding and reproduction places of mosquitoes are blocked from the source. Pyrethroid insecticides are selected to keep the ground clean and free of accumulated water, improve environmental sanitation, strive to remove their breeding places, and strengthen the protection of mosquitoes' natural enemies, such as bats, swallows, dragonflies, spiders, geckos and frogs, so that they can eliminate mosquitoes and adopt biological control, Avoid environmental pollution. (outlook new era)