Small red dots on the body can be considered as skin manifestations such as cherry angioma, allergic purpura or spider nevus. 1. Cherry angioma: it is a benign vascular proliferative disease, which occurs in middle-aged and old-aged people, and is caused by the increase of capillaries as well as their expansion, which can be hemispherical red papules of the size of a grain of rice, with clear borders. 2. Anaphylactic purpura: it can be related to the history of medication, food, upper respiratory tract infections and other causes, and can appear in the limbs, joints, trunk and other places of the pressure does not fade the color of the red spots. 3. Spider nevus: can be seen in cirrhosis, acute or chronic hepatitis, etc., can be manifested as a small red dot in the center, surrounded by a network of small radial blood vessels, with the liver to estrogen inactivation weakened. Small red dots on the body, it is recommended to consult a doctor in a timely manner to identify the nature of the red dots, after a clear diagnosis of the cause of the symptomatic treatment.