Black blood blisters in the mouth may be caused by irritation stimulation or bite wounds, burns, hemangiomas, etc., which need to be dealt with by general measures, and medication and surgical treatment if necessary. 1. Stimulation stimulation or bite: if the patient’s teeth are relatively sharp or teeth residual root crown, may lead to oral mucosa is stimulated, easy to cause black blood blisters. If the patient’s oral blood blisters are relatively small, no treatment is needed, and the blood blisters will absorb on their own. If the oral black blood blisters are relatively large, you need to seek medical attention to sterilize the surface of the blisters, and if necessary, cooperate with the doctor to use a sterile syringe to draw off the liquid inside. 2. Scalding: For black blood blisters in the mouth caused by scalding, the severity of the scalding needs to be checked. If the patient has superficial II degree burns or deep II degree burns and the localized blisters are small, no treatment is needed. If the localized black blood blisters are relatively large, it is necessary to seek medical treatment for sterilization and so on. 3. Hemangioma: If the black blood blisters appear in the patient’s mouth due to hemangioma, the nature of hemangioma needs to be checked. For patients with junctional hemangiomas, anti-tumor drugs can be used under the guidance of doctors, such as pingyangmycin, bleomycin, etc., and some patients also need to take surgical resection of local hemangiomas. It is recommended that patients with black blood blisters in the mouth need to consult a doctor in a timely manner, the doctor will choose appropriate measures for the patient’s condition treatment.