Infection: A blister, otherwise called an aphthous ulcer, is a solitary pale or yellow ulcer with a red external ring or a bunch of such ulcers in the mouth, more often than not on the cheeks, tongue, or inside the lip.
Mouth sores often go away in 10 to 14 days, even if you don't do anything. They sometimes last up to 6 weeks. The following steps can make you feel better:
Avoid hot beverages and foods, spicy and salty foods, and citrus.
Gargle with salt water or cool water.
Eat fruit-flavored ice pops.
This is helpful if you have a mouth burn.
Take pain relievers like acetaminophen.
For canker sores:
Apply a thin paste of baking soda and water to the sore.
Mix 1 part hydrogen peroxide with 1 part water and apply this mixture to the sores using a cotton swab.
For more severe cases, treatments include fluocinonide gel (Lidex), anti-inflammatory amlexanox paste (Aphthasol), or chlorhexidine gluconate (Peridex) mouthwash.
Over-the-counter medications, such as Orabase, can protect a sore inside the lip and on the gums.
Blistex or Campho-Phenique may provide some relief of canker sores and fever blisters, especially if applied when the sore first appears.Acyclovir cream 5% can also be used help reduce the duration of the cold sore. To help cold sores or fever blisters, you can also apply ice to the sore
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