Red spots on the body without pain or itching may be caused by cherry angioma, spider nevus and thrombocytopenic purpura. 1. Cherry angioma: its cause may be related to capillary proliferation, expansion and aging, genetic mutation, patients will appear in different sizes of bright red or purplish-red papules. 2. Spider nevus: its etiology may be related to chronic liver disease, estrogen increase and other factors, clinical manifestations of nevus body center has a small point, surrounded by a network of small blood vessels radiating outward, mostly red. 3. Thrombocytopenic purpura: manifested as petechiae ecchymosis of the skin and mucous membranes, usually not accompanied by pain and itching, the etiology of the disease is mostly related to immunity, heredity and primary diseases. There are many reasons that lead to red spots on the body without pain or itching, and it is recommended that patients seek medical examination to clarify the disease.