For various reasons in life, blood blisters can grow in the mouth. When you find blood blisters in the mouth should not be handled by yourself, you should go to the hospital stomatology department for consultation. Most of the blood blisters in the mouth are caused by trauma, such as eating too fast or eating too hot, too hard food may cause the production of blood blisters in the mouth. Because of such eating, it will lead to strong friction of oral mucosa, thus producing blood blisters. Furthermore, if the chewing accidentally bites into the buccal mucosa, tongue or upper and lower lip mucosa, blood blisters will also grow soon afterwards, with fresh blood inside the blisters at first, and the contents will turn black soon after. In this case, do not pick it by yourself, you should go to the regular stomatology clinic in time. First, check the blood routine and coagulation six, in the case of excluding blood system diseases, the doctor can use sterile tissue scissors, cut the vesicle wall, and then use compound borax solution or compound chlorhexidine mouthwash gargle, external use of tin type of san, ice borax or nourishing yin raw muscle san to prevent infection to promote healing. Usually chew and swallow slowly and check regularly. There must be a reason for the long blood blisters in the mouth, once the mouth long blood blisters must be promptly to the regular hospital stomatology department to receive examination, find the cause of treatment.