There are many causes of red dots on the body, such as purpura, cherry angioma, spider nevus and so on. 1. Purpura: common types are allergic purpura, thrombocytopenic purpura, due to the increased permeability of the blood vessel wall and abnormal coagulation function, causing skin petechiae and ecchymosis, which will lead to red dots on the body. 2. Cherry angioma: it is a benign tumor of the skin, associated with capillary proliferation and expansion, which will lead to red dots on the body. 3. Spider nevus: abnormal metabolism of estrogen in women’s bodies during pregnancy, as well as liver disease affecting the inactivation of estrogen, can cause spider nevus to appear on the body, which can also lead to reddish red dots on the body. There may be other reasons for the red dots on your body, so you should go to the hospital in time and follow the doctor’s instructions for treatment.