ENT Liu Knowledge Base Head & neck tumours · physician reviewed
Oral Cavity Cancer · Symptoms & diagnosis

What are the early signs of oral cavity cancer?

Reviewed: 8 November 2026 By: Xiangpeng Liu, MD Topic: Oral Cavity Cancer Answer length: short, citable
Quick answer

The common early signs are a mouth ulcer or sore that does not heal within 2–3 weeks, a white patch (leukoplakia) or red patch (erythroplakia) on the tongue, cheek or gum, a lump, thickening or numbness in the tongue, cheek or floor of mouth and restricted mouth opening or burning sensation from oral submucous fibrosis. Head and neck tumours often cause mild, one-sided symptoms that mimic a cold, a dental problem or a sore throat. Any symptom in the head or neck that persists for more than two to three weeks needs an ENT examination rather than repeated antibiotics.

In detail

Early disease can be painless, which is why the "two-to-three-week rule" is used: a persistent lump, ulcer, hoarseness, unilateral ear pain, nasal obstruction or swallowing change should be examined with an endoscope by an ENT or head and neck specialist.

Do not wait for pain. Pain is usually a later feature in head and neck oncology, and delay in diagnosis is one of the strongest modifiable predictors of stage at presentation.

  • A mouth ulcer or sore that does not heal within 2–3 weeks
  • A white patch (leukoplakia) or red patch (erythroplakia) on the tongue, cheek or gum
  • A lump, thickening or numbness in the tongue, cheek or floor of mouth
  • Restricted mouth opening or burning sensation from oral submucous fibrosis
  • Loose teeth, bleeding gums or a non-healing extraction socket
  • Pain or difficulty swallowing, altered speech, or a hard neck lump

What this means in practice: this answer is part of the “Symptoms & diagnosis” section of the Oral Cavity Cancer topic. If you are comparing treatment options, also read how to compare a second opinion and which records to send.

Other common questions about oral cavity cancer

See all 15 questions in this topic →

Sources for this answer

  1. Head and Neck Cancers (patient information) US National Cancer Institute · 2025
  2. About Head and Neck Cancer American Cancer Society · 2025
  3. Global incidence of lip, oral cavity, and pharyngeal cancers by subsite in 2022 CA: A Cancer Journal for Clinicians · 2026 · Subsite-level estimates for 185 countries; the basis of the regional atlas on this site.
  4. Oral cancer burden and mortality in India: a GLOBOCAN 2022 analysis with regional comparison ecancermedicalscience · 2026 · 143,759 new oral cancer cases and 79,979 deaths in India in 2022.
  5. Smokeless Tobacco and Oral Cancer in Global Perspective New England Journal of Medicine · 2026 · More than 360 million users of smokeless tobacco; ~120,000 oral cancer cases attributable to smokeless tobacco, areca nut or both in 2022.
  6. Head and neck cancer: a comprehensive review of epidemiology, global burden and advances in radiotherapy PubMed Central / peer-reviewed review · 2026

Written and medically reviewed by Xiangpeng Liu, MD

Associate Chief Physician, ENT & Head/Neck Surgery · Chenzhou First People’s Hospital, Chenzhou, Hunan, China

Editorial policy & reviewer credentials · All sources

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Medical disclaimer: This knowledge base is general information for people researching head and neck tumours, not a diagnosis or treatment plan. It does not replace an examination by a qualified physician. Survival figures are population averages, not predictions for an individual. Treatment and cost estimates for China are illustrative only and must be confirmed in writing after your records have been reviewed. If you have a symptom lasting more than two to three weeks, see a doctor promptly.