The correct term for the palate is palatine, and large blood blisters on the palate are usually traumatic mucosal blood blisters caused by trauma when chewing or swallowing food, as follows. Oral soft palate mucosa without epithelial keratinized layer, and capillary rich, in swallowing too big, too hard, sharp food or swallowing too fast may cause trauma to the soft palate mucosa, resulting in capillary rupture bleeding, the formation of large blood blisters, that is, traumatic mucosal blisters. The diameter of the blister can be 2~4 centimeters, often accompanied by foreign body sensation and pain symptoms. There may be other reasons for the appearance of large blood blisters on the palate, it is recommended to go to the hospital in a timely manner, with the help of the doctor to clarify the cause of the disease and early targeted treatment.