Suddenly a patch of bumps on the body is very itchy may be acute urticaria, eczema, insect bite dermatitis, scabies and other diseases, for specific diseases, you can choose the appropriate drugs, such as cetirizine, zinc oxide lotion, mupirocin ointment and so on for treatment. 1. Acute urticaria: urticaria patients, manifested as scattered erythema, wind, can use the second generation of antihistamines, such as cetirizine, loratadine, fexofenadine, etc.; serious condition, but also need to go to the hospital immediately rescue. 2. Eczema: Eczema patients can also be accompanied by blisters, scales and other symptoms. Treatment, according to different symptoms, can be used externally to relieve itching agent treatment, such as zinc oxide lotion, glycerite lotion, etc.; external antibacterial treatment, such as mupirocin ointment, fusidic acid cream, etc.; oral antihistamine treatment, such as chlortetracycline, cetirizine and so on. 3. Insect bite dermatitis: manifested as scattered erythematous nodules with itching, and blisters can be combined in severe cases. For the treatment of this disease, topical glucocorticosteroid therapy can be used, such as dieldieldield cream, hydrocortisone cream, etc.; antihistamine therapy can be used when necessary, such as cetirizine, loratadine and so on. 4. Scabies: Scabies patients manifested as perineum, abdomen, finger cracks mainly red spots, papules, punctate scabs with itching, severe cases can involve the whole body. Sulfur ointment can be used externally; when itching is severe, oral antihistamine treatment, such as loratadine, ibastine, etc.; anti-parasitic drug treatment, such as ivermectin. It is recommended that patients go to the dermatology department of regular hospitals in a timely manner, combined with the relevant examination, to clarify the specific disease, under the guidance of the doctor’s reasonable use of medication, not blindly self-medication.