Purple blood bags on the tongue may be caused by bite wounds, or may be caused by certain diseases, such as hemangioma of the tongue, thrombocytopenic purpura, leukemia, etc., and the patient should consult the doctor in time to find out the cause of the disease. 1. Bite: If the patient accidentally bites the tongue, the capillaries of the tongue rupture, and blood can accumulate, thus forming hematoma and purple blood bags. 2. Hemangioma of tongue: hemangioma of tongue is a congenital benign tumor caused by the development of vascular malformation, patients may have nodular bulging of tongue, purplish-red on the tongue surface, which may be accompanied by obvious enlargement of the tongue, the swelling is soft to touch, the border is not clear, and there may be unclear spitting, difficulty in swallowing, difficulty in breathing and other manifestations. 3. Thrombocytopenic purpura: Thrombocytopenic purpura is a hemorrhagic disease characterized by a decrease in platelets, leading to bleeding of the skin and mucous membranes. Patients show repeated skin and mucous membrane petechiae, purpura, ecchymosis, and in severe cases, multiple organ and intracranial hemorrhage can also occur. 4. Leukemia: purple blood bags on the tongue may also be caused by leukemia. Most early leukemia patients may have symptoms of bleeding in various parts of the body, which may be accompanied by anemia, infection, fever, as well as symptoms such as liver and spleen enlargement. If you have purple blood on your tongue, you should consult a doctor in time, complete the relevant examinations, make a clear diagnosis, and have the doctor carry out targeted treatment.