Always contagious?
No; the cause matters.
← All explanationsStomatitis
What does inflammation of the mouth lining mean?
Stomatitis is an umbrella term for inflammation of the lining of the mouth. Possible causes include mechanical irritation, a contact reaction or an infection. The term alone identifies neither the cause nor the appropriate treatment.
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The mouth lining is affected
The moist lining of the mouth can become inflamed. Redness, tenderness or small sore areas may develop; appearance alone does not establish the cause.
Several causes are possible
A sharp tooth edge, rubbing from a denture, a contact reaction or an infection may be involved. Areas that look similar can have different causes.
Check the course and the cause
Onset, duration, medicines and possible sources of irritation matter. A sore lasting longer than three weeks needs assessment; severe or worsening symptoms should be assessed sooner.
Read the full explanation
The mouth lining is affected
The moist lining of the mouth can become inflamed. Redness, tenderness or small sore areas may develop; appearance alone does not establish the cause.
Several causes are possible
A sharp tooth edge, rubbing from a denture, a contact reaction or an infection may be involved. Areas that look similar can have different causes.
Check the course and the cause
Onset, duration, medicines and possible sources of irritation matter. A sore lasting longer than three weeks needs assessment; severe or worsening symptoms should be assessed sooner.
Notes on the teaching images
- Fictional teaching illustration, not a patient case or treatment result.
At a glance
A diagnosis from a picture?
No. Similar changes can have different causes.
When to seek assessment?
Persistent, unusual or worsening changes should be examined.
Knowledge in motion
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Silent educational film with German on-screen text and simplified teaching images. Not a patient case or a promised treatment outcome. The full English explanation is available as text.
Often confused
Inflammation does not always mean infection
Stomatitis describes inflammation. Infection can cause it, but so can rubbing, injury or a contact reaction. A single mouth ulcer is also different from widespread inflammation of the lining.
Quick answers
Is stomatitis the same as herpetic gingivostomatitis?
No. Stomatitis is a general term for inflammation of the mouth lining. Herpetic gingivostomatitis is a specific condition caused by herpes viruses. A red or painful area is not automatically this infection.
Is stomatitis contagious?
That depends on the cause. A mechanically irritated area is different from a transmissible infection. The word stomatitis alone does not establish whether it is contagious.
What can help a sore area?
The cause needs to be assessed first. A soft toothbrush and avoiding irritating, very hot or rough-edged foods may be more comfortable when the mouth is sore. The term alone cannot determine which medicine is appropriate.
When should I have my mouth lining checked?
A sore that lasts longer than three weeks, looks unusual, bleeds or becomes more painful needs assessment. Do not wait three weeks if symptoms are severe or getting worse quickly.
At the practice
For the appointment
You can bring this question to your appointment:
When did the change start, and could a source of irritation or a new medicine be involved?
An examination can help clarify changes in the mouth lining and the next steps if symptoms persist.
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- Mucosa
- The medical term for a mucous membrane, here the lining of the mouth.
- Ulceration
- An open defect in the mouth lining; one possible appearance, not a synonym for all stomatitis.
Make the distinction
Stomatitis describes inflammation. Infection can cause it, but so can rubbing, injury or a contact reaction. A single mouth ulcer is also different from widespread inflammation of the lining.
Sources and context
Editorial research: . General information, not an individual diagnosis or treatment recommendation. Teaching illustrations are simplified and do not depict a patient case.