Oral Conditions

Mouth Ulcer

Q: How long should I wait before seeing a doctor about a mouth ulcer?

Any mouth ulcer that has not healed within 3 weeks should be evaluated by a specialist — an oral and maxillofacial surgeon or oral medicine specialist. Most benign ulcers heal within 7–14 days. A persistent ulcer beyond 3 weeks raises concern for a potentially malignant lesion and requires examination and biopsy.

Q: Is a painless mouth ulcer more dangerous than a painful one?

Paradoxically, yes. Painful ulcers are more often benign (aphthous, traumatic, or viral). Early oral cancer often presents as a painless, indurated ulcer that the patient tends to ignore precisely because it does not hurt. Painlessness should not be used to dismiss a persistent ulcer.

Q: What is a biopsy and is it painful?

A biopsy involves taking a small tissue sample from the ulcer under local anaesthesia — the area is numbed first, so the procedure is not painful. The tissue is sent for histopathological analysis, which determines the exact diagnosis. Results typically take 5–7 days. This is the only way to definitively confirm or exclude cancer.

Q: Can stress cause mouth ulcers?

Yes. Psychological stress is a well-recognised trigger for recurrent aphthous ulcers (canker sores). However, stress-related ulcers are benign and self-limiting — they heal within 2 weeks. Stress does not cause oral cancer. A persistent ulcer that does not heal must be evaluated regardless of whether the patient is under stress.

Most mouth ulcers are harmless and heal within two weeks. But an ulcer that persists beyond 3 weeks, is painless, or has hardened edges requires specialist evaluation to rule out oral cancer — the most important diagnosis not to miss.

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Warning Signs

When a Mouth Ulcer Needs Urgent Evaluation

Ulcer present for more than 3 weeks
Painless ulcer (malignant ulcers are often painless)
Hardened (indurated) edges or base
Associated lump or swelling in the jaw or neck
Difficulty swallowing or opening the mouth
Numbness of the lip, tongue, or chin
Unexplained bleeding from the ulcer
Associated white or red patch around the ulcer

Types

Types of Mouth Ulcer

The most common type. Small, round, painful ulcers with a white or yellow centre and red halo. Usually heal in 7–14 days without treatment. Often recurrent. Not caused by infection and not contagious.

Caused by a sharp tooth, ill-fitting denture, or accidental cheek bite. Heals once the cause is removed — usually within 2 weeks. If it does not heal after removing the cause, specialist evaluation is needed.

White or red patches (not true ulcers) that can become ulcerated. These are premalignant conditions — some progress to oral cancer. A biopsy is required for all persistent white or red patches.

A non-healing ulcer that persists beyond 3 weeks, particularly with hardened edges, pain on pressure, and does not respond to standard treatment. Biopsy is mandatory to confirm or exclude malignancy.

Caused by Herpes simplex virus. Multiple small vesicles that burst to form shallow ulcers, often on the lips (cold sores) or palate. Usually heal in 10–14 days. Antiviral treatment shortens duration.

An immune-mediated condition causing lacy white patches (Wickham striae) or painful erosive ulcers. Requires regular specialist review due to a small risk of malignant transformation over time.

Common Questions

Frequently Asked Questions

How long should I wait before seeing a doctor about a mouth ulcer?

Is a painless mouth ulcer more dangerous than a painful one?

What is a biopsy and is it painful?

Can stress cause mouth ulcers?

Persistent Mouth Ulcer? Do Not Wait

Specialist evaluation and biopsy provides a definitive diagnosis. Early detection of oral cancer saves lives. Available at The Maxillofacial Clinic, Rampurhat.

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Mouth Ulcer

When a Mouth Ulcer Needs Urgent Evaluation

Types of Mouth Ulcer

Aphthous Ulcer (Canker Sore)

Traumatic Ulcer

Leukoplakia / Erythroplakia

Oral Cancer (Carcinoma)

Viral Ulcer (Herpetic)

Oral Lichen Planus

Frequently Asked Questions

Persistent Mouth Ulcer? Do Not Wait