Read below about mouth sore with a layer covering it, including causes and common questions. Or get a personalized analysis of your mouth sore with a layer covering it from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

This symptom can also be referred to as:
Mouth sore with white coating

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9 Potential Mouth Sore With a Layer Covering It Causes

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.

  1. 1.Coxsackie b Virus Infection

    Coxsackie B Virus usually doesn't cause any symptoms but can be the cause of nonspecific fever and, in rare cases, lung or heart infections. The disease is most common in children but adults are susceptible too.

    3-4 days

    Rarity:
    Uncommon
    Top Symptoms:
    fever, fatigue, headache, nausea, loss of appetite
    Symptoms that always occur with coxsackie b virus infection:
    fever
    Urgency:
    Self-treatment
  2. 2.Acute Viral Sinusitis

    Sinusitis is an inflammation of the sinus spaces behind the nose and cheeks. These spaces produce mucus, which drains into the nose. If the nose is swollen or if the mucus does not drain, this can block the sinuses and cause pain or infection.

    Symptoms should subside within 7-10 days

    Rarity:
    Common
    Top Symptoms:
    headache, cough, sinusitis symptoms, sore throat, congestion
    Symptoms that always occur with acute viral sinusitis:
    sinusitis symptoms
    Symptoms that never occur with acute viral sinusitis:
    being severely ill
    Urgency:
    Self-treatment
  3. 3.Viral Infection of the Larynx (Voice Box)

    Acute laryngitis is an inflammation of the voice box (larynx) due to infection.The vocal cords are located inside the larynx. Normally, the vocal cords open and close freely, but in laryngitis, they become inflamed. This swelling causes distortion of the sounds produced by air passing over them, making one's resulting voice sound hoarse.

    Less than 3 weeks

    Rarity:
    Common
    Top Symptoms:
    sore throat, runny nose, fever, dry cough, hoarse voice
    Urgency:
    Self-treatment
  4. 4.Acute Bacterial Sinusitis

    Acute bacterial sinusitis occurs when the sinuses become infected and, in turn, inflamed, which causes pain and other symptoms. The sinuses are air-filled cavities in the face that are generally clean and empty but when they're sick collect excess mucus and can become infected. When your symptoms are persisting for 10 days or more or are getting worse over time, it's more likely that you'll have a bacterial infection as compared to a viral infection.

    7-15 days

    Rarity:
    Common
    Top Symptoms:
    fatigue, headache, cough, sinusitis symptoms, muscle aches
    Symptoms that always occur with acute bacterial sinusitis:
    sinusitis symptoms
    Symptoms that never occur with acute bacterial sinusitis:
    clear runny nose, being severely ill
    Urgency:
    Primary care doctor

    Mouth Sore With a Layer Covering It Checker

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  5. 5.Influenza

    Influenza, or Flu, is an infection of the airway caused by the flu virus, which passes through the air and enters the body through the nose or mouth. The symptoms are similar to those of a cold, but the flu is usually more serious.

    Most recover within 1 week but cough and malaise can persist for 2 weeks.

    Rarity:
    Common
    Top Symptoms:
    fatigue, headache, loss of appetite, cough, muscle aches
    Symptoms that never occur with influenza:
    headache resulting from a head injury
    Urgency:
    Phone call or in-person visit
  6. 6.Strep Throat Requiring Throat Swab

    Strep throat is a bacterial throat infection that can make the throat feel sore and scratchy. Only a small portion of sore throats are the result of strep throat. And, if you do not show enough signs of a true strep throat, testing may be needed before treatment is begun.

    1-3 days with treatment

    Rarity:
    Common
    Top Symptoms:
    fatigue, nausea, sore throat, fever, rash
    Symptoms that always occur with strep throat requiring throat swab:
    sore throat
    Symptoms that never occur with strep throat requiring throat swab:
    general weakness
    Urgency:
    Primary care doctor
  7. 7.Canker Sore

    Canker sores are small, grayish-white sores in the mouth, often on the inside of the cheeks, lips, and on the tongue. No one really knows why canker sores happen, but it seems to be inherited and susceptible to vitamin deficiencies and allergies.

    1 week

    Rarity:
    Common
    Top Symptoms:
    painful mouth sore, numerous mouth sores, mouth sore surrounded by a red area, single mouth sore, oral ulcer
    Symptoms that always occur with canker sore:
    painful mouth sore
    Urgency:
    Self-treatment
  8. 8.Influenza (in a Suppressed Immune System)

    Influenza, or the "flu," is an infection of the airway caused by the flu virus, which passes through the air and enters the body through the nose or mouth. The symptoms are similar to those of a cold, but the flu is usually more serious.

    Most recover within 1 week.

    Rarity:
    Common
    Top Symptoms:
    fatigue, headache, cough, loss of appetite, sore throat
    Urgency:
    In-person visit
  9. 9.Uterine Fibroids

    Uterine fibroids are noncancerous tumors in the uterus. They are common in women of childbearing age.

    Treatment ranges from medication to surgical removal of the fibroid.

    Rarity:
    Common
    Top Symptoms:
    vaginal bleeding, pelvis pain, abdominal cramps (stomach cramps), painful periods, irregular period
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Mouth Sore With a Layer Covering It

  • Q.Any fever today or during the last week?
  • Q.Do you have a rash?
  • Q.Have you been feeling more tired than usual, lethargic or fatigued despite sleeping a normal amount?
  • Q.Have you lost your appetite recently?

If you've answered yes to one or more of these questions, try our mouth sore with a layer covering it symptom checker to find out more.

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Mouth Sore With a Layer Covering It Symptom Checker Statistics

  • People who have experienced mouth sore with a layer covering it have also experienced:

    • 6% Fatigue
    • 6% Neck Bump
    • 4% White, Lacy Plaque on Tongue
  • People who have experienced mouth sore with a layer covering it had symptoms persist for:

    • 46% Less Than a Week
    • 27% Less Than a Day
    • 10% Over a Month
  • People who have experienced mouth sore with a layer covering it were most often matched with:

    • 7% Coxsackie b Virus Infection
    • 4% Viral Infection of the Larynx (Voice Box)
    • 2% Acute Viral Sinusitis
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

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Take a quiz to find out why you’re having mouth sore with a layer covering it

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