Itchy bumps on the skin may be caused by insect bite dermatitis, eczema and other diseases, need to address the cause of the disease through the use of topical glucocorticosteroids, calcium-modulated phosphatase inhibitors, oral antihistamines and other improvements. 1. Insect bite dermatitis: mosquito bites can appear red, swollen, blisters, itching and other manifestations. Patients need to comply with the medical advice of local use of glycerine lotion, or hydrocortisone, trimethoprim and other glucocorticoid cream, itching significant need to comply with the medical advice of the use of cetirizine, loratadine and other antihistamines. 2. Eczema: associated with a variety of internal and external factors, the skin can appear erythema, papules, oozing and other polymorphic damage. Patients can use glucocorticoid ointment such as dexamethasone, mometasone furoate, halometasone, and calcium-modulated phosphatase inhibitors such as tacrolimus ointment and pimecrolimus ointment as prescribed by the doctor, as well as oral antihistamines such as cetirizine and chlorpheniramine maleate as prescribed by the doctor. For patients with chronic recalcitrant eczema, immunosuppressants or physical therapy, such as ultraviolet light therapy, can also be combined. It is recommended that patients with itchy bumps on the skin go to the hospital, cooperate with the doctor to actively treat the specific medication to be prescribed by the doctor.