Why is it swollen when bitten by mosquitoes?

Actually, it should be said that it was bitten by mosquitoes. Mosquitoes cannot open their mouths, so they don't bite the skin. In fact, they pierce people's skin with six needle-like structures, and these probes form the center of the mouthparts for eating.

These oral needles suck blood just like blood needles; Mosquitoes also excrete saliva containing anticoagulant to prevent blood coagulation, so that they can be safely eaten. Mosquitoes ate, drank and drifted away, leaving behind an itchy and swollen bag.

After the arrival of summer, mosquitoes breed, especially in the rainy season, and mosquito larvae-multiply in large numbers in floods. Mosquito bites make it difficult for people to fall asleep and spread diseases. But it is not easy to eradicate mosquitoes completely, and being bitten by mosquitoes is inevitable. When mosquitoes bite, the mouthparts will secrete an organic acid-formic acid, and its chemical composition is HCOOH.

Female mosquitoes suck blood in order to get protein in the blood to nourish the ovaries, so the saliva of female mosquitoes will secrete an organic acid similar to anticoagulant, so that the blood will not coagulate, but the organic acid left on human skin is a foreign body, and some people will have allergic phenomena, such as itching and swelling.

Antipruritic formula

1. At home, you can use thick soap to stop itching quickly, or you can dip soap in water at swollen places.

The reason is the sodium salt of higher fatty acids in soap. Such as: C 17H35COONa. The sodium salt of this fatty acid is alkaline (containing OH-) after hydrolysis, and the formic acid aqueous solution contains H+. Because OH- in soap water and H+ in formic acid neutralize into H2O, it can quickly eliminate pain and itching.

2, apply some ammonia to relieve itching, the principle is the same as above.

3. If the bite is itchy, you can play it with your fingers first, and then apply toilet water and wind oil.

4. Applying or brewing the itchy place with salt water can soften the lump and effectively relieve itching.

5, you can use the juice in aloe leaves 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.

6. Applying tiger balm and salt can make local anesthesia, relieve nerves and relieve itching.

7. After grinding aspirin pills, applying water to the wound also has anti-inflammatory and detumescence effects.

8. If you are sensitive to mosquito bites, take an antihistamine before going out.

Recently, Finland reported that antihistamines can block immune response and reduce itching and swelling caused by mosquito bites.

However, the side effect of antihistamines is that drivers want to sleep and avoid taking them.

I strongly disapprove of netizens taking antihistamine western medicine because they are afraid of mosquito bites, and I strongly disapprove of suggesting that everyone take western medicine easily because they are afraid that mosquito bites will itch, which will mislead everyone's health!

9. As long as you are willing to change the diet of alkaline vegetables, your body and blood are slightly alkaline. Mosquitoes not only don't like to bite, but they don't itch too much even after being bitten! If you bite, you can apply your own slightly alkaline saliva to the mosquito bite, and it can also stop itching!

10, break off a garlic clove, and apply a mosquito-bitten bag on the cross section. It will be fine in a moment and stop itching.

1 1, several people will bite you together, one is mainly related to the smell, and you also eat something that mosquitoes hate:

On April 10, the service column of CCTV 2 tells you a way to prevent mosquitoes: take vitamin B 1, and if you go outdoors, take it 3-4 days in advance. She said that people can't feel it, mosquitoes can't stand that smell and will stay away from you. It is said to be particularly effective. Just try it.

Soaking in water with 12 and vitamin B 1 will also keep mosquitoes away.

This water-soluble vitamin has no side effects. Excess ingredients are completely excreted and will not be stored in the human body.

13. Soak two pieces of Illicium verum in the seasoning in a warm washbasin and bathe with its water to keep mosquitoes away.

14. Burning dried orange peel indoors can replace mosquitoes, repel mosquitoes and eliminate indoor odor.

Wear light clothes. Attention, everyone! Aedes mosquitoes (also known as spotted mosquitoes) like to park on black clothes. So in hot summer, everyone should try to wear some lighter clothes.

Wear as many socks as possible. Many people like to wear shoes barefoot in summer, but they don't know that after wearing socks, mosquitoes feel that people's skin humidity is reduced, and the volatiles on the skin surface are reduced, which will reduce bites.

17, you can't catch it after being bitten. If we are bitten by mosquitoes, we will catch them at once. However, after scratching, the tissue fluid and lymph in the skin ooze out and swell into a bag, which will become more and more itchy and will not fade easily. This is how the "red bean leg" wrapped in a red envelope was caught. If you insist on not grasping, the itching will obviously subside after 10 to 15 minutes.

18. Mosquitoes like to park near the window sill before dusk, and they like to park on dark objects on the indoor surface after nightfall. According to this rule, they will get twice the result with half the effort.

19, family aquatic plants should change water regularly.

20, when using mosquito repellent, a brand in continuous use for 2 months, for a drug to repel mosquitoes, the effect is better.

2 1, eating garlic can effectively repel mosquitoes, because mosquitoes don't like the smell of garlic secreted by human body.

22. Use cool oil and essential oil skillfully. Put a few boxes of uncovered cool oil or essential oil in the bedroom. Light mosquito-repellent incense, the smell is choking; Hanging mosquito nets makes the air dull. If you can drop a proper amount of essential balm on the whole mosquito before lighting it, the mosquito-repellent incense will not choke people, the room will be clear and the mosquito repellent effect will be good. If you can sprinkle a few drops of essential balm before entering the mosquito net, you can improve the air condition in the mosquito net and increase the mosquito repellent effect.

23. Put mosquito repellent flowers. Before dusk, put 1 indoors and put 2 pots of blooming jasmine, Milan or roses, preferably cordate telosma. The mosquito couldn't stand the smell of these flowers and ran away.

24. Install orange light bulbs indoors, because mosquitoes are afraid of orange light, so they can have a good mosquito repellent effect.

25. Rub the dried Folium Artemisiae Argyi into a rope, light it and put it indoors. Smoke can repel mosquitoes.

Burning dry tea leaves can drive away mosquitoes.

27. Put 35 ml of sugar water or beer in an empty wine bottle on the table or in a room with many mosquitoes. When mosquitoes smell sweet wine, they will inject it into the bottle and be stuck to death by sugar water or beer.

28. Close the doors and windows, put a basin in front of the window and add some water mixed with washing powder. The next day, there will be some dead mosquitoes in the basin. If this method is used continuously every day, it is almost unnecessary to spray pesticides to kill mosquitoes. There will be fewer and fewer mosquitoes.

Why can soapy water kill mosquitoes?

Because washing powder is alkaline, mosquitoes should not grow in alkaline water, but there are spices in washing powder, which will make female mosquitoes mistakenly think that there is food and lay eggs in it. So as to achieve the effect of killing mosquitoes.

29. Gently drop a few drops of essential balm on the used mosquito-repellent incense tablets, plug in the power supply, and you can achieve a strong mosquito repellent effect and save the tablets. In case of power failure, you can also use wind oil to drop one or two used tablets and light them together. You can kill mosquitoes in a few minutes.

30. When using mosquito repellent to repel mosquitoes, it is best to place a plate of mosquito repellent with a plant height of about 30 cm and more than 40 pieces in an indoor area of about 15 square meter.

Seven experts on plant mosquito repellent.

In the beautiful plant world, there are many flowers and plants that are both ornamental and can drive away mosquitoes! Below, let's take everyone to meet!

tuberose

Also known as the night fragrant tree, it is native to tropical America. Leaf blade cordate, margin pilose. Every summer and autumn, clusters of yellow-green bell-shaped flowers will bloom in the axils of leaves, and when they go to the treetops in the same month, they will float out bursts of fragrance, which makes mosquitoes afraid. It is a good mosquito repellent.

light purple

This is a blue-purple flower. Originated in the Mediterranean, it likes to be dry, and its flowers are like wheat ears, which usually bloom in June. Lavender itself has insecticidal effect. People usually put sachets made of lavender in the cupboard, and some put them in the bedroom to repel mosquitoes.

Nepenthes vulgaris

It is a typical insect-eating plant. It has strange leaves and a long round "insect catching bottle" hanging at the top. The bottle mouth has a lid that can be opened and closed. There are dozens of pitcher plants, and different kinds of insect traps are different in shape, size and color. Nepenthes can be used as medicine to treat hepatitis, stomachache, hypertension and cold, and it is also an expert in mosquito catching.

pelargonium

Geranium is full of flowers and can adapt to all parts of the country. In the hot season, place it in an outdoor cool environment; Watch it in a bright room in the cold season. Geranium has a unique smell that makes mosquitoes and flies run away.

Common jasmine orange

This is a small shrub that is evergreen all the year round. Umbrella-shaped, with bright branches and dense gray leaves, there are red berries after flowering, which adds beauty to the simple room. Touch its leaves, you will feel a thick sweet fragrance, which has a good mosquito repellent effect.

Chinese caterpillar fungus

It is a kind of compositae herb, which can grow to 1 m high, with small yellow flowers and hundreds of flower heads. There is mucus around each flower head, just like five little fingers sticking out, which is very interesting. As long as there are small mosquitoes on it, they will be stuck. After that, the insect will be slowly digested by it as its growth nutrition. If the dust is digested without a trace after a few days, put a pot in the pot to catch mosquitoes and vacuum at home.

Mosquito repellent vanilla

The lemon twist fragrance emitted by mosquito repellent herbs is mainly citronellal, citronellol and other aromatic natural essential oils with mosquito repellent effect, so as to achieve the purpose of mosquito repellent.

According to the characteristics of mosquito repellent, the following points should be paid attention to during maintenance:

1. Mosquito repellent weeds are better maintained than common flowers and trees, and are more resistant to organic fertilizers, with a life cycle of more than 8 years.

Usually pay attention to more ventilation and more light to keep the soil loose and moist. When not in use during the day, it can be placed on a bright and ventilated windowsill or balcony, and it is best to receive one or two hours of direct sunlight every day.

Second, when mosquitoes appear at night, put mosquito repellent in the center of the room. Before use, spray water evenly on the front and back of the blade with a special small sprayer (no water spray, the effect is not good), and spray it again half an hour later.

Third, in the process of use, it is best to change to a larger flowerpot. Mosquito repellent has a well-developed root system, which can absorb more organic matter from flowerpots, but we should also pay attention to keep the soil moist frequently and water it once a week or so.

It should be noted that mosquito repellent only has mosquito repellent function, but not mosquito repellent function. In order to prevent mosquitoes from adapting, the room should be thoroughly disinfected two days before use. This will keep mosquitoes out.