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Learn about your dark red/purple mouth sore, including causes and common questions. Or get a personalized analysis of your dark red/purple mouth sore 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.

Dark Red / Purple Mouth Sore Checker

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Your Dark Red / Purple Mouth Sore May Also be Known as:
Purple mouth blister
Purple mouth bump
Purple mouth lump
Red mouth blister
Red mouth bump
Red mouth lump
Red mouth sore

Top 3 Dark Red / Purple Mouth Sore Causes

  1. 1.Hand - Foot - and - Mouth Disease

    Hand-foot-and-mouth disease is a mild, contagious viral infection common in young children. It is characterized by sores in the mouth and a rash on the hands and feet.

    You can safely treat this condition on your own by using a topical oral anesthetic to relieve the pain of mouth sores. Over-the-counter pain medications other than aspirin, such as acetaminophen (Tylenol) or ibuprofen (Advil, Motrin) may help relieve general discomfort.

    Rarity:
    Rare
    Top Symptoms:
    loss of appetite, cough, fever, sore throat, new headache
    Symptoms that always occur with hand-foot-and-mouth disease:
    spontaneous skin changes
    Urgency:
    Self-treatment

    Dark Red / Purple Mouth Sore Checker

    Take a quiz to find out why you’re having dark red/purple mouth sore.

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  2. 2.Cold Sore

    Cold sores (also called oral herpes or fever blisters), are viral infections of the mouth caused by the herpes virus type 1. You were probably infected very early in life as a child when an adult kissed you. The virus stays asleep (dormant) and causes infections every now and then after exposure to lots of sun or emotional/physical stress. It is contagious when an outbreak is happening, but treatment is limited unless you are immunocompromised.

    You can safely stay home or try some minor treatments. As a viral infection, it will go away on its own without antibiotics. Balm mint cream (1%) or topical rhubarb-sage cream may improve symptoms, but it's not standard treatment.

    Rarity:
    Uncommon
    Top Symptoms:
    mouth lesions, pain on the outside of the lips, itchy mouth, burning pain on the outside of the lips, lip numbness
    Symptoms that always occur with cold sore:
    mouth lesions
    Urgency:
    Self-treatment
  3. 3.Mononucleosis Infection

    EBV Mononucleosis is a clinical syndrome characterized by fever, sore throat, and swollen lymph nodes.

    You should visit your primary care physician within the next 24 hours. Diagnosis is confirmed by looking for antibodies against EBV. Treatment involves supportive care (hydration, antipyretics, and analgesics, such as acetaminophen and ibuprofen). Aspirin should not be given to children because of the possibility of Reye syndrome. It is also recommended that you do not do any strenuous physical activity and contact sports in the initial 3 to 4 weeks of illness due to the potential for splenic rupture.

    Rarity:
    Common
    Top Symptoms:
    fatigue, headache, loss of appetite, abdominal pain (stomach ache), cough
    Symptoms that never occur with mononucleosis infection:
    rectal bleeding
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Dark Red / Purple Mouth Sore

  • Q.How many sore/blister/bumps do you have?
  • Q.Do you have a rash?
  • Q.When did you develop the sore/blister/bump?
  • Q.Do you have a sore throat?

If you've answered yes to one or more of these questions, check our dark red/purple mouth sore symptom checker.

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Dark Red / Purple Mouth Sore Symptom Checker Statistics

  • People who have experienced dark red/purple mouth sore have also experienced:

    • 20% Fever
    • 20% Foot Skin Changes
    • 20% Palm Rash
  • People who have experienced dark red/purple mouth sore had symptoms persist for:

    • 47% Less Than a Day
    • 28% Less Than a Week
    • 10% Over a Month
  • People who have experienced dark red/purple mouth sore were most often matched with:

    • 62% Cold Sore
    • 25% Hand - Foot - and - Mouth Disease
    • 12% Mononucleosis Infection

Dark Red / Purple Mouth Sore Checker

Take a quiz to find out why you’re having dark red/purple mouth sore.

Take a quiz