The causes of small red blood moles on the body are as follows: 1. It is normal for patients who are pregnant or obese to have small red moles on the body due to the elevated level of estrogen in the body and the decreased metabolism ability of the liver, which does not require special treatment, and the small red blood moles can disappear after the baby is born. 2. People who work in summer or in high temperature rooms for a long time have small red moles on the skin due to the expansion of capillaries in the subcutaneous dermal papillary layer. 3. Patients suffering from liver cirrhosis and liver cancer have problems with liver function metabolism, resulting in a decrease in the liver’s ability to inactivate estrogen, leading to the growth of small red blood moles on the body. Do not be nervous or careless when small blood moles appear on your body, go to the hospital in time, the doctor will prescribe the corresponding laboratory tests according to the situation, and according to the laboratory results, determine the cause of the disease and take medicine or laser or freezing methods to remove the small blood moles.