Blisters or blood blisters on the palate of the oral cavity are mostly traumatic blisters or blisters caused by eating spicy, hot or hard foods. If the blister is small, it can usually be absorbed by the body, but it is important to avoid eating spicy and hot foods again. If the blood blister or blister is large, the foreign body sensation in the mouth is strong and has affected speech and swallowing. In this case, it is necessary to go to the hospital under the strict sterilization of the doctor to pick the blood blisters or blisters and drain the pus and blood. Patients should not use a sharp object such as a needle or toothpick at home to pick the blister, as this can easily cause a bacterial infection in the mouth. After picking the blister, you can use a mouthwash with anti-inflammatory properties, such as rinsing with tinidazole gargle, to prevent local infection.