Insect bites with red, swollen and itchy skin are recommended to be treated with glucocorticoid drugs and anti-allergic drugs under doctor’s supervision. If the patient’s skin redness and swelling symptoms are more obvious, it is recommended to follow the doctor’s instructions to apply glucocorticoid drugs to treat, such as halometasone cream, mometasone furoate cream, etc., to play an anti-inflammatory, anti-itching effect. For patients with severe itching, it is recommended to take oral anti-allergy drugs under the guidance of a doctor, such as loratadine, cetirizine and so on. In addition, patients should strengthen the care of the damaged place during the treatment and pay attention to the prevention of infection. When the patient is bitten by the insect, the skin appears red, swollen, itchy symptoms, should go to the hospital in time, and under the guidance of the doctor for appropriate treatment.