The child was bitten by mosquitoes and swollen and hard mainly general treatment, local medication, oral medication and so on. 1. General treatment: avoid excessive scratching or alcohol, saltpeter and other prescription treatment, so as not to cause local breakthrough infection or aggravate the skin inflammatory reaction. 2. Local treatment: you can apply local anti-itching drugs, more commonly used is glycerine lotion, you can also apply dexamethasone cream, budesonide cream and so on. 3. Oral medication: patients with severe itching can use antihistamines to relieve symptoms, such as cetirizine, diclofenac tadalafil, if the effect is not obvious or the symptoms are particularly serious, you can also take oral glucocorticosteroids, such as prednisone, methylprednisolone and so on. The child was bitten by a mosquito, according to the severity of the condition, under the guidance of the doctor to choose the appropriate treatment, the above drugs should be used in accordance with the doctor’s instructions, can not be used blindly.