The phenomenon of large bumps on the body is also relatively common in clinical practice. The main causes of large bumps on the body in daily life are the following: 1. Allergic dermatitis, after patients are exposed to certain chemicals, dust, pollen and other substances, there will be red spots, papules and bumps around the body, due to allergic reactions caused by allergies. 2. Papular urticaria, after patients are bitten by mosquitoes, the release of mosquito The patient’s body will appear as a result of the venom, red spots, resulting in large bumps on the body. 3, urticaria, due to infection, chronic wasting diseases of internal medicine will appear on the body red bumps, large bumps. 4, generalized eczema, eczema is a chronic recurrent inflammatory skin disease, the acute onset will appear large areas of red spots, papules, blisters, accompanied by intense itching.