Blood blisters in the throat, clinically there may be the following diseases: first, patients eat hard things or eat hot things, resulting in damage to the pharyngeal mucosa, the appearance of submucosal blood blisters, this situation is the most common, smaller blood blisters can be observed, larger blood blisters can go to the hospital to let the doctor use a syringe to draw out the blood blisters inside; second, some patients have a hemangioma in the throat, hemangioma local bleeding and Thirdly, some patients have some special bacterial infection in the throat, forming submucosal hematoma, this situation is also there; Fourthly, some patients have blood-related diseases, such as thrombocytopenia, coagulation factor deficiency induced by submucosal bleeding, in this case, we should be highly vigilant, can not casually draw blood or cut blood, or easily lead to bleeding more than.