Little black mosquitoes bite for two weeks? Experts say: scratching can cause delayed allergies, and the more you scratch, the more itchy you are.

The weather is getting better and better, and the sun shines on the grass, which makes everyone want to go out to play. Many parents take their children close to nature, only to find that everyone is stung badly. There were no mosquitoes, and the whole calf and thigh were stung. The black spot I can't see clearly is actually a famous black mosquito in south-central China. Professor Wu Zhengnan, the host of Taiwan Province Research Center of Central Taiwan Province University of Science and Technology, pointed out.

Anyone who has been bitten by a black mosquito knows that the place bitten by a black mosquito is more itchy than that bitten by a common mosquito, and it is not only extremely itchy at the moment of being bitten. Wu Zhengnan said that some people will itch after being scratched for two weeks, and even leave a bite mark commonly known as "red bean ice". The reason why black mosquito bites are extremely itchy is because black mosquitoes have immediate allergic reactions in addition to bites. If you don't scratch it at this moment, it will start its "delayed allergic reaction".

But how can you resist itching? Wu Zhengnan suggested that it is best to ice. You can take drinks or ice products with you and stick them on your skin. If you can't apply ice, quickly rinse the bitten part with cold water and pat it gently. Flapping can also relieve itching. If you don't catch the immediate allergic reaction, you won't cause the delayed allergic reaction, and people can't catch it.

However, a better way to prevent mosquitoes is to wear pants. Wu Zhengnan said that black mosquitoes are used to flying low, so the main attack place is the leg. Therefore, it is best to wear pants where there are black mosquitoes, because the mouthparts of black mosquitoes are very short, so unlike ordinary mosquitoes, wearing pants can mostly avoid the attack of black mosquitoes. But if you are sitting, the little black mosquito may still bite the bare arms, neck and face without a coat and long sleeves, while the child is short, and if there is no protection, the whole body may be the target of the little black mosquito bite.

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"Anti-mosquito liquid is very effective! Wu Zhengnan said that although black mosquitoes are not real mosquitoes, the protective effect of general mosquito repellents is very effective, but attention should be paid to buying "drug" mosquito repellents approved by the Ministry of Health and Welfare. Don't mistake it for the approval of the Environmental Protection Agency. Environmental protection drugs approved by the Environmental Protection Bureau are mainly sprayed on clothes, mosquito nets and so on. And it must be a drug-grade mosquito repellent to be sprayed directly on the skin.

Many people think that as long as they don't stay in a cool place that loves mosquitoes, they can avoid being bitten by black mosquitoes. Wu Zhengnan reminded that black mosquitoes like hot environment, generally around 20 degrees Celsius to 32 degrees Celsius, so places with sunshine or light and shadow are the main habitats of black mosquitoes, especially from 10 to1point in the morning and from 3 to 5 pm. It is best not to go to the favorite habitat of black mosquitoes.

Black mosquitoes don't like places with low temperature and strong wind, so they are rare in the seaside with strong sea breeze and Keelung with low temperature.

Bamboo forests, jungles, gardens, slopes, pavilions, corridors, children's playgrounds and streams are the most common places for black mosquitoes, because the food of black mosquito larvae is wet algae on bare soil; Look carefully at the wet ground or there is a thin layer of green on the stone. These are blue-green algae that little black mosquitoes like.

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Wu Zhengnan said that many people said, "Why can't the control of black mosquitoes in Taiwan Province Province be as successful as cutting off malaria mosquitoes in the past? Controlling black mosquitoes is completely ineffective. " At that time, highly toxic DDT was sprayed in the air, but now, for the sake of environmental protection, this highly toxic and aerial spraying method cannot be adopted. The only way to prevent and control black mosquito larvae is to turn over the ground with our own hands, improve the drainage function, and spread gravel on it to keep the ground dry and prevent the growth of moss. Without food, black mosquito larvae will not reproduce; However, it still needs long-term efforts. Before the prevention and control is successful, everyone should pay attention to spraying mosquito repellent and wearing trousers and long sleeves to prevent itching.