The possible causes of many pinpoint red blood spots on the body include thrombocytopenic purpura, spider nevus, cherry angioma and other diseases. 1. Thrombocytopenic purpura: the cause of the disease is not clear, may be related to human immune system disorders, genetic and other factors. The patient’s skin and mucous membranes will show bleeding spots of the size of a needle point. 2. Spider nevus: mainly related to estrogen and androgen disorders in the body, cirrhosis of the liver, drug abuse, excessive obesity and other reasons may also induce the disease. It is mainly manifested as small red spots on the skin, dilated blood vessels, etc. Some normal people can also see this skin change. 3. Cherry angioma: the cause of the disease is still unclear, may be related to gene mutation, aging and other factors. Patients will have localized papules or nodules, which are bright red, purple-red, etc. The diameter is usually 1~5mm, mostly seen in the trunk, upper limbs and other parts of the body. If there are a lot of small red blood spots on the body, it is recommended to go to a regular hospital for examination and to clarify the cause of the disease.