The condition of blood blisters in the throat is commonly caused by the following reasons: 1, eating rougher food: it is possible that eating some rougher food may lead to localized hematoma bulge in the mucosa of the soft palate or the mucosa of the posterior pharyngeal wall, resulting in a certain degree of pain and blockage in the throat. 2, inflammation of the throat: some patients may be due to acute and chronic inflammation of the throat. Factors that lead to congestive lymphoid follicular hyperplasia in the back wall of the throat can also cause a certain degree of pain, dryness, burning, foreign body sensation, etc. in the throat. It is often associated with excessive use of voice, excessive smoking, drinking, eating spicy and irritating food, exposure to air pollution, etc. If necessary, patients need to undergo electronic laryngoscopy to help further clarify the diagnosis.