Definition A canker sore is a painful, open sore in the mouth. Canker sores are white or yellow and surrounded by a bright red area. They are not cancerous. A canker sore is not the same as a fever blister (cold sore). Alternative Names Aphthous ulcer; Ulcer - aphthous Causes, incidence, and risk factors Canker sores are a common form of mouth ulcer . They may occur with viral infections. In some cases, the cause cannot be determined. Canker sores may also be linked to problems with the body's immune (defense) system. The sores may occur after a mouth injury due to dental work, aggressive tooth cleaning, or biting the tongue or cheek. Canker sores can also be triggered by: Emotional stress Lack of certain vitamins and minerals in the diet (especially iron, folic acid , or vitamin B-12 ) Menstrual periods Hormonal changes Food allergies Anyone can develop a canker sore. Women are more likely to get them than men. Canker sores may run in families.
Mouth sores usually 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 cool water or eat popsicles. This is helpful if you have a mouth burn.
Take pain relievers like acetaminophen.
For canker sores:
Rinse with salt water.
Apply a thin paste of baking soda and water.
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.
Nonprescription 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 blister...
Canker sores and fever blisters
Are fever blisters and canker sores the same thing?
No. Canker sores occur only inside the mouth and are not contagious. They sometimes occur as a result of trauma (biting the inside of the lip, burning the mouth with hot food), but may also occur without any known reason.
or cold sores are caused by herpes simplex virus type 1 and are very contagious. Fever blisters often come back in the same location.
You should knowAnswers to your question are meant to provide general health information but should not replace medical advice you receive from a doctor. No answers should be viewed as a diagnosis or recommended treatment for a condition. Content posted by community members does not necessarily reflect the views of Remedy Health Media, which also reserves the right to remove material deemed inappropriate.