Red bumps on the body that are itchy may be the result of hives. The cause of the formation of this kind of pockmark is mainly due to allergic factors forming allergic inflammation, which usually mainly manifests as limited pockmark. The underlying factor of the formation of the puffs may be due to allergens that cause some mast cells in the skin to degranulate, and the degranulation of some histamine and leukotriene and other inflammatory factors, which stimulate the surrounding capillaries and peripheral nerves, thus causing itching symptoms, accompanied by a certain amount of inflammatory edema, which is usually seen in the puffs. These are the red bumps with itchy symptoms that are usually seen.