Red bumps on the body are itchy, a condition that could be hives. In particular, some red bumps are characteristic of urticaria. It may also be a papular urticaria formed by insect bite dermatitis, which causes localized inflammatory edema of the skin after an insect bite or insect allergy, and therefore produces itchy symptoms. In addition, this kind of red bumps may also be drug rash formed by drug allergy, because the patient during the use of drugs, if the allergic reaction to the drug, there will also be some allergic changes in the skin, so there will be some red patches or red windbag-like erythema and edema, etc., so will also produce itching symptoms. In addition, patients with psoriasis may also develop red patches with itching.