Patients with blood blisters in the throat may be caused by pharyngeal trauma, pharyngeal diseases and so on. 1. Throat trauma: when patients eat hard things or eat hot things, it may lead to the damage of the mucous membrane in the throat area, appearing blood blisters under the mucous membrane, this situation belongs to traumatic diseases. 2. Throat disease: when the patient’s throat is infected with pathogenic bacteria causing acute pharyngitis, pharyngitis, tonsillitis and other throat diseases, it may cause blood blisters in the throat. It is recommended that patients seek timely medical examination, clear causes for targeted treatment, pay attention to rest in life, avoid overwork, try to light, semi-fluid or fluid-based, avoid eating hard, spicy and stimulating food.