Why do mosquitoes bite?

First, the principle of biting: only female mosquitoes bite people, not every time they meet people. It bites people mainly because it needs human blood to breed the next generation. Mosquitoes use their antennae and sensors on three pairs of legs. When you are asleep, you keep breathing out carbon dioxide. Mosquitoes will slowly follow the smell and buzz over your head. At the same time, they will use its proximity sensor to measure the humidity, temperature and composition of your sweat, so as to decide whether you are a suitable target. A mosquito's mouth protrudes under its eyes. It consists of six needles instead of sharp thorns. These needles are thinner than hair. Two of them are esophageal duct and salivary gland duct; Two are The Lancet (upper jaw) and two serrated knives (lower jaw). These six tubes are all wrapped in foreskin for protection. The shell of the oral cavity is like a clip, which holds six needles together. With the help of these terrible weapons, it began to act. First, insert six thorns into your skin together and enter your dense capillary network. If it can successfully pierce one of these blood vessels thinner than hair, you can have a full meal. Before sucking blood, it will drip saliva into your capillaries and mix with your blood to prevent blood from condensing in its esophagus and causing blockage. With the help of this blood anticoagulant, the long belly of the female mosquito is red and swollen in less than 1 minute. This sounds terrible. In fact, sucking 15~20 times like this adds up to only one tear. What's annoying is that after it bites, the residue of saliva remains in the skin, which makes you itch so much that you have to pat it hard. But by then, mosquitoes had buzzed away like overloaded large transport planes. Then, it comes down from the sky with your blood, which may stop on the wall outside or on a leaf. In the next few days, it stayed there quietly and laid hundreds of eggs with the blood it sucked. Generally speaking, mosquitoes like to bite these kinds of people: 1. A dark-skinned person; 2. People with high body temperature; 3. Strong people; 4. People who sweat a lot; 5. People with large lung capacity and deep breathing; 6. Active people; 7. People with fragrance; 8. People in dark clothes; 9. People who expose their bodies. Second, mosquito repellent and bite prevention: 1. The best way to repel mosquitoes in summer is to isolate mosquitoes with mosquito nets or screens. Before mosquitoes wreak havoc, you must install a screen door with good sealing at home and close the screen door behind you to prevent mosquitoes from entering the room. 2, mosquito nets, safe harbor hanging mosquito nets is the first choice for mosquito repellent. Some people may think that hanging mosquito nets is old-fashioned, which has long been shelved or simply discarded. Please change your mind quickly and buy a new mosquito net, which is a magic weapon against mosquitoes. 3. The unpleasant smells of plant mosquito are orange peel, mint, fennel, clove, lavender, eucalyptus, citronella, platycodon grandiflorum, geranium, basil and thyme. If dried orange peel and orange peel are wrapped in stockings and put in the corner, the smell will not only prevent mosquitoes but also refresh the air; When taking a bath, drop a few drops of toilet water or essential oil in the bathtub, which will not only feel refreshing, but also repel mosquitoes, but be careful not to use it excessively to avoid irritating the skin; Drop geranium essential oil (4 drops) into almond oil (10 ml), mix well, and apply it on hands and feet, or less on face, to prevent mosquito bites when going out or sleeping; Buy an aromatherapy stove, drop a few drops of lavender or eucalyptus essential oil, and the room will suddenly be fresh, and the "buzzing" sound will suddenly disappear. However, the fragrance lasts only 1-3 hours, so we should grasp the time. Before dusk, put 1 2 pots of blooming jasmine, Milan or roses indoors, preferably cordate telosma. It can also play a very good mosquito repellent effect. 4. Mosquito-repellent incense and electric mosquito-repellent incense are commonly used methods. The main component of mosquito-repellent incense is insecticide, generally pyrethroids, which is less toxic. However, some mosquito-repellent incense uses organochlorine pesticides, organophosphorus pesticides and carbamate pesticides. Although this mosquito-repellent incense increases the mosquito repellent effect, it is much more toxic. In addition, the smoke of mosquito-repellent incense will make the baby feel uncomfortable, even smokeless mosquito-repellent incense will inevitably have smoke. Under normal circumstances, mosquito-repellent incense should not be used indoors, because the respiratory system of infants and young children has not been fully developed and the skin absorption capacity is strong. The principle of electric mosquito-repellent incense is to inhale pesticides into paper and evaporate pyrethrins through hot air. Although pyrethrins are less toxic and safer, electric mosquito-repellent incense has a strong killing effect on microorganisms, so families with infants should try not to use it. If you use electric mosquito-repellent incense in your baby's room, try to put it in a well-ventilated place and don't use it for a long time. 5. Insecticide Insecticide is a highly toxic liquid and the first killer of mosquitoes, so it is a must-have item for many families. The application of pesticides should be timely, appropriate and appropriate, and it is best to use it when the baby is out. Close the screen door and screen window after full ventilation, and then take the baby back to the house. It is best to use it in dark and humid places where mosquitoes often haunt and hide, such as toilets, sinks, table feet, cabinets and other places. The types of pesticides should be changed frequently to avoid mosquito resistance. 6, anti-mosquito liquid outdoor anti-mosquito, the most commonly used is anti-mosquito liquid. The main component of mosquito repellent is DEET, and its odor can directly act on the tactile organs and chemoreceptors of mosquitoes to drive them away. Mosquitoes are afraid of the smell of mosquito repellent, so the stronger the smell, the better. In general, the concentration of anti-mosquito liquid is less than 50%, which has no side effects on adults. But if there are children at home, the concentration should be less than 10%, or not at all. Using mosquito repellent can better prevent mosquito bites. Apply a little mosquito repellent to your skin. When a mosquito approaches you, it will disturb its senses and lose its ability to bite. Light-colored clothes can also prevent several kinds of mosquitoes from attacking. Installing mosquito repellent curtains on windows can also repel mosquitoes. Put a little alcohol on the edge of your clothes, and mosquitoes will not dare to bite you, just wander around you. For the baby, try it on the inside of the baby's upper arm before use (the skin here is the most delicate and sensitive), and then use it in a large area after confirming that there is no adverse reaction. In addition: put several boxes of open cooling oil and wind oil essence in the bedroom; Eating garlic, taking vitamin B 1 orally (but not taking it in large quantities for a long time) or dropping a few drops of vitamin B solution in the bath can also prevent mosquitoes; Wearing light-colored clothes in summer can reduce mosquito bites. Installing orange light bulbs indoors can produce good mosquito repellent effect, because mosquitoes are afraid of orange light. Rub the dried Folium Artemisiae Argyi into rope shape, light it and put it indoors. Smoke can repel mosquitoes. Burning dry tea leaves can drive away mosquitoes. Put 35 ml of sugar water or beer in an empty wine bottle on the table or in a place with many mosquitoes indoors. When mosquitoes smell sweet wine, they will inject it into the bottle and stick it to death. Of course, more importantly, to eliminate mosquitoes from the source, it is best to clean up the places where mosquitoes are easy to breed, especially the still water and blocked sinks. Remember: as long as you can accumulate a little water-in a beer bottle or a broken tire, countless mosquitoes may grow in a week. □ Don't leave the water in the container at home for too long. If mosquito larvae are found, they should be scalded to death with boiling water. -Don't throw garbage in the shape of eggshells and containers. It is best to use a trash can with a lid. -Pay attention to the intersection of floor drain and sewer when living on the ground floor. -The drainage system of residential property should be checked, and it should be converted into culverts if possible, and the drainage ditch should be fortified with mosquito gates, and the sewer should be dredged every day if possible. All kinds of potholes, dead ponds, etc. It should be filled up, and if it is not satisfied, it is necessary to regularly apply pesticides. -Household aquatic plants should change water regularly. □ If you want to travel far away, be sure to cover the toilet to prevent mosquitoes from laying eggs. Third, post-bite treatment: 1. Most people will have symptoms such as redness, itching and pain after being bitten by mosquitoes. At this time, you can use alkaline substances to relieve itching, such as ammonia water, or you can use soap dipped in water to apply it to the redness and swelling, which will stop itching in a few minutes. 2. If the bite is itchy, you can play it with your fingers first, and then apply toilet water and wind oil. 3. Applying or brewing the itchy place with salt water can soften the lump and effectively relieve itching. The juice in aloe leaves can be used to relieve itching. When you are red, swollen and itchy after being bitten by mosquitoes, you can cut a small piece of aloe leaf, break it after washing, and rub it a few times at the red and swollen place to reduce swelling and relieve itching. After blowing out the match, burn the place bitten by mosquitoes. You can also apply toothpaste and mercuric chloride, and apply some infinite ointment with anti-inflammatory, antipruritic and analgesic effects. 6. Break a garlic clove and stick a mosquito bite bag on the cross section, and it will be fine in a short time, and it can also relieve itching (the second method is especially suitable for pregnant women who have been bitten by mosquitoes)