Blisters on the gums tend to clear up on their own after 10 to 14 days without any treatment, says MedlinePlus. Some practices that help to improve the healing process include avoiding hot foods, spicy foods and citrus; eating fruit-flavored ice pops; gargling with salt water; and taking pain medications, such as acetaminophen. Applying water and a thin layer of baking soda helps to relieve canker sores. Severe canker sores require fluocinonide gel, chlorhexidine gluconate or anti-inflammatory amlexanox paste.
There are different types of mouth blisters or sores, and they appear anywhere in the mouth, including lips, gums, tongue and inner cheeks, explains MedlinePlus. They occur due to irritation from braces, poorly fitting dentures, a sharp or broken tooth, chewing tobacco, and burning from hot drinks or food. Cold sores are contagious, and the herpes simplex virus causes them. Application of ice to the sore helps to relieve cold sores or fever blisters.
It's possible to lessen the chances of getting common mouth sores by chewing slowly, avoiding hot foods, using a soft-bristle toothbrush, reducing stress, and visiting a dentist to address misfitting dentures or a broken tooth, says MedlinePlus. Medical treatment for blisters involves medications that reduce inflammation, antiviral drugs or mouthwash.