If the body bumps, but not painful, not itchy, is a very common clinical skin manifestations, can cause the body bumps but not painful, not itchy for a number of reasons, in daily life the most common reasons are mainly the following: First, contact dermatitis, when the patient contact with certain substances in the outside world, it will lead to an acute allergic reaction of the skin mucosa, the contact area will appear erythema, papules, not necessarily It may be accompanied by painful itching. Second, atopic dermatitis, atopic dermatitis is mostly related to genetics or increased blood IgE, and red bumps will appear on the body, not accompanied by itching. Third, papular urticaria, after being bitten by mosquitoes and insects will appear red bumps from the size of a grain of rice to the size of a green pea, initially not accompanied by pain or itchiness. Fourth, eczematous dermatitis, eczema has many causes, once acute eczema is found to be transformed into chronic eczema, there will be mossy papules, not accompanied by painful itching.