Bug bites with large itchy bumps are referred to as insect bite dermatitis in medical terms, and can be relieved by general treatment and medication. 1. General treatment: insect bite dermatitis patients can use water or soap to wash the affected area, avoid excessive scratching of the local, so as not to aggravate the condition. 2. medication: you can follow the doctor’s instructions for external use of glycerite lotion, can play the effect of astringent, anti-itching. Topical glucocorticoid drugs, such as hydrocortisone, mometasone furoate, etc., with anti-inflammatory, antipruritic effect, for patients with secondary infection, can be used externally fusidic acid, mupirocin and other antibiotic drugs. If there is a reaction to insect bites, it is recommended to go to a regular hospital, under the guidance of the doctor for treatment, the specific use of drugs need to follow the doctor’s instructions.