Red spots from mosquito bites that do not go away for a long time may be caused by a decrease in one’s own metabolism or a high level of mosquito toxicity. Mosquito bite, will use the mouthpiece to inject toxins into the skin, resulting in localized red spots, will also be accompanied by obvious itching. Is caused by papular urticaria, may be due to the body’s metabolic decline or mosquito toxicity, etc., the red spots do not go away for a long time. It is recommended to do a good job of local care, avoid scratching and stimulation, and avoid being bitten by mosquitoes again. Also go to the hospital dermatology department, combined with the doctor’s advice with medication. Mosquito bites caused papular urticaria, it is recommended that under the guidance of a doctor to give glycerine lotion, mometasone furoate ointment local application, can effectively relieve itching, if necessary, oral loratadine, imipramine and other drugs, can reduce the release of histamine in the skin, can relieve the itching. Mosquito bites caused by itching, long time can not subside need to pay attention to, can be combined with the doctor’s advice to give medication, do not self-medication.