Sore Mouth Infection is a common infection that mostly forms on the insides of the mouth (also known as the oral cavity), in the mucous membrane part of it. However, it is also commonly associated with other diseases that may occur in the human body, but fortunately, it has no serious underlying causes associated with it.

Sore mouth infection usually appears within the soft tissues of the mouth, either on the lips, cheeks, gums, tongue, floor and roof of the mouth.

Two major causes of a sore mouth infection are local trauma (i.e. rubbing from a sharp edge) and aphthous stomatitis (also known as “canker sores”), an ulcer that forms in the mouth but has no medical explanation as to why it forms. The canker sore causes pain to the infected individual, but it will heal over time, usually after a week or two.

Other causes of sore mouth infections could be the following:

  • Biting the tongue, cheek or lip
  • Accidentally burning the mouth with hot foods or liquids
  • Irritation from sharp objects such as braces, retainer or dentures
  • Brushing the teeth too hard or via the usage of a firm toothbrush
  • Chewing of tobacco
  • Having the herpes simplex virus


There are several types of known Sore Mouth Infection (Mouth Sore/Mouth Ulcer). Below is a list of those said types:

  • Cold sore
  • Anemia
  • Gingivostomatitis
  • Infectious mononucleosis
  • Canker sore
  • Folate deficiency
  • Oral thrush
  • Hand, foot, and mouth disease
  • Leukoplakia
  • Oral lichen planus
  • Celiac disease
  • Mouth cancer
  • Pemphigus Vulgaris



There are also several symptoms from this illness; most of them are sores and visual symptoms. Below is the list of symptoms:

  • Large sores sized larger at half an inch in diameter
  • Frequent outbreak of mouth sores
  • Rashes
  • Joint pain
  • Fever
  • Diarrhea


For this kind of illness, a diagnosis is not usually needed. However, if a person experiences some of the following from the list below, it is highly advised for them to see their doctor.

  • Having white patches on the sores is a sign of having leukoplakia or oral lichen planus
  • If the person has herpes complex or other infections
  • Sores that remains after more than two weeks
  • Having side effects after taking medications
  • Started cancer treatment
  • Had recent transplant surgery



For sore mouth infections that need medications, a doctor usually prescribes pain medications in the form of anti-inflammatory drugs or a steroid gel. However, if the patient has a previous infection, it will be first treated as per doctor’s prescription.

Moreover, most common sores will naturally heal by themselves after 10 to 14 days or even shorter. However, prevention is preferred to avoid having sores again. Below are some tips in doing so:

  • Avoid consuming foods that contain too much salt, sugar, spice, citrus, and are hot
  • Avoid or eliminate tobacco and alcohol
  • Gargle with saltwater daily in the morning
  • Consume cold foods and beverages such as ice cream
  • Do not squeeze or pick on the sores or blisters

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