What do you know about fleas?

Recently, patients who often travel, travel, stay in hotels and hotels come to see a doctor. After inspection, most of them were bitten by fleas. Besides, there are many outdoor lawns in Beijing. In summer, people wear pants and skirts, especially when they walk on the lawn at night, and they are easily bitten by fleas. After being bitten by fleas, the skin surface often forms dotted red swelling. The flea was bitten to pieces. Once it is attached to people's skin, it will keep biting and form a big red envelope. Then you can see the big purple spot of the needle in the center of the hard wound, which is the bite mark. Some patients may have blisters on their swollen surfaces. Flea bites are redder, more hemolytic and more itchy than mosquito bites. Treatment of this flea bite, generally with lye washing, rubbing, often washing, generally with soap, baking soda water and formic acid left by flea bites. You can also pour a certain concentration of alkaline solution on cotton cloth or cotton and smear it on the wound. After about half an hour, although the bitten bag is still there, the itching will gradually ease and the bag will slowly begin to fade.