Suddenly a black blood blister on the edge of the tongue is considered to be caused by dietary stimulation, but also may be the emergence of oral ulcers, tongue hemangioma and other diseases, can be treated with medication or surgery. 1. Dietary stimulation, if it is caused by dietary stimulation on the edge of the tongue suddenly a black blood blisters, you can use salt water gargling, eat more light food, a few days after the gradual recovery may be. 2. Mouth ulcers, if there are mouth ulcers, the oral mucosa is stimulated by this symptom may arise, can be under the guidance of the doctor to use cidi iodine, watermelon cream and other drugs to relieve the black blood blisters. 3. Tongue hemangioma, if there is tongue hemangioma, tongue hemangioma is relatively small generally do not need treatment, can be followed up regularly. However, if the hemangioma of the tongue is relatively large, it is necessary to carry out timely surgical treatment to remove the hemangioma of the tongue. Usually need to appropriate sports, enhance personal body resistance.