If there is a black blood blister from the tongue bite, it needs to be treated according to the size of the blood blister. 1. If the blood blister is large: it affects eating and requires prompt medical attention. Puncture the blood blister and suck out the blood to achieve the effect of treatment. In addition, you can follow the doctor’s instructions to use drugs to promote ulcer healing, such as rehabilitation of new liquid, recombinant human epidermal growth factor gel, etc. The blood blisters will form an ulcerated surface after rupture, and if you don’t use the drugs, the healing time will be longer, and the drugs can be applied to control the infection and promote the healing of the ulcer. 2. If the blood blisters are small, the bleeding is small, and does not show signs of continuous development, under normal circumstances, there is no need to intervene in the treatment, improve the daily diet, eat some lighter food, usually about a week or so can be absorbed by itself, the problem is relatively small, no need to worry about it too much. If there are more black blood blisters, it is recommended to consult a doctor and follow the doctor’s instructions for symptomatic treatment.