The causes of sudden onset of the body like a mosquito bite include papular urticaria, hives and so on. 1. papular urticaria: mostly due to mosquito bites after mosquito toxin allergies lead to skin allergic reactions, can appear on the body, especially the face, limbs and other exposed parts of the body suddenly appeared a lot of pimples with the wind ball rash with itching, rash pattern like mosquito bites. At this time, you can follow the doctor’s instructions to use topical glucocorticosteroids, such as Dinaid cream, anti-allergy treatment. 2. urticaria: urticaria is due to the skin, mucous membrane small blood vessel expansion and permeability increase and a limited edema reaction, can also appear on the body suddenly like mosquito bites of the symptoms of the bag, can be given to loratadine and other antihistamines, prednisone and other glucocorticosteroid treatment. If the phenomenon of sudden onset of the body like mosquito bites, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor to use medication.