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Canker Sore: Symptoms & Causes

There are three types of canker sores and each of them can be accompanied by a fever, sluggishness or swollen lymph nodes. They are all painful and most are circular with a white or yellow center and red border.

  1. Minor Canker Sores

    • According to the Mayo Clinic, these canker sores are oval and clear up on their own in about two weeks.

    Major Canker Sores

    • These sores are large and irregularly shaped and can last from several weeks to a few years.

    Herpetiform Canker Sores

    • These sores are usually clusters of tiny sores that can merge to form one larger sore.

    Immune System

    • Some people have immune systems that attack the healthy cells in their mouths instead of the unhealthy bacteria.

    Injury or Illness

    • An injury to your mouth from a sports accident or from biting your cheek can cause a canker sore. Also, some diseases such as celiac disease, inflammatory bowel diseases and HIV/AIDS can increase your risk for canker sores.

    Foods

    • People can get them when they have food allergies, and some foods are known to increase risk of developing a canker sore such as eggs, nuts and strawberries.

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