Smaller intraoral blood blisters generally do not require special treatment and can usually subside on their own in about 5-7 days; however, if the blood blisters are larger, the specific recovery time is not certain and it is recommended to consult a professional doctor. Most of the blood blisters in the oral cavity are caused by traumatic, if the oral submucosal hematoma is very small, and there are no obvious conscious symptoms, or the symptoms are mild, it can be left untreated, and the bruises will absorb on their own in 5-7 days. If the hematoma is large, it is recommended to go to the stomatology department for disinfection, incision and drainage, and application of healing-promoting drugs to promote rapid wound healing. In addition, if the blood blister in the patient’s mouth is a hemangioma, it is not recommended to pick it at random, which may cause more than one bleeding, and it needs to be judged under the guidance of a stomatologist and given a targeted treatment plan. In addition, it is important to maintain oral hygiene in daily life. You can use light salt water or compound chlorhexidine gargle to rinse your mouth to avoid oral infection.