10 Warning Signs of Head and Neck Cancer
A symptom-based checklist for patients and clinicians: which head and neck changes deserve an ENT examination, how long to wait, and what the first tests should be.
Any head or neck symptom that persists for more than two to three weeks without an obvious cause should be examined by an ENT or head and neck specialist. The most important warning signs are a painless neck lump, a non-healing mouth ulcer, persistent hoarseness, one-sided nasal blockage or bleeding, difficulty swallowing, and unilateral ear pain with a normal ear examination.
What is the two-to-three-week rule?
Persistence, not severity, is the trigger for referral.
Most head and neck cancers begin with symptoms that look like everyday problems: a cold that lingers, a mouth ulcer, a hoarse voice, a blocked ear or a tender tooth. Inflammatory conditions normally settle within two weeks. A symptom that is still present after two to three weeks needs direct visualisation with an endoscope and, if a lesion is seen, a biopsy.
Pain is a poor guide. Early tumours are often painless, and pain usually appears only when the tumour invades deeper structures. Waiting for pain, or accepting repeated courses of antibiotics, steroids or antifungal treatment without an examination, is the commonest avoidable cause of late diagnosis.
| Warning sign | Why it matters | First test |
|---|---|---|
| Painless neck lump | Could be a nodal metastasis from tonsil, tongue base, nasopharynx, thyroid or skin | Ultrasound + fine-needle aspiration |
| Mouth ulcer or white/red patch >2–3 weeks | Oral cavity cancer or a potentially malignant disorder | Oral examination + incisional biopsy |
| Hoarseness >2–3 weeks | Classic early sign of glottic laryngeal cancer | Flexible laryngoscopy |
| One-sided nasal blockage or nosebleeds | Sinonasal or nasopharyngeal tumour, especially in endemic regions | Nasal endoscopy + contrast MRI |
| Unilateral "blocked ear" in an adult | Eustachian tube obstruction by a nasopharyngeal tumour | Nasopharyngoscopy + audiometry |
| Difficulty or pain on swallowing | Hypopharyngeal, oropharyngeal, oesophageal or laryngeal lesion | Flexible endoscopy + contrast CT/MRI |
| Ear pain with a normal ear exam | Referred pain from the throat or tongue base | Full head and neck endoscopy |
| One tonsil larger, or a neck cyst | Occult HPV-positive oropharyngeal primary | FNA with p16/HPV testing + PET-CT |
| Loose tooth or non-healing socket | Possible gingival or maxillary sinus tumour | Dental panoramic radiograph + biopsy |
| Changing mole or non-healing facial/scalp sore | Melanoma, BCC or cutaneous SCC | Dermoscopy + excisional biopsy |
What should I do if I have one of these signs?
See a clinician who can look directly at the site — do not self-treat for weeks.
- Book an appointment with an ENT / otolaryngologist, oral medicine specialist or dentist, stating the exact duration of the symptom.
- Ask for flexible nasopharyngolaryngoscopy (a brief clinic procedure) and imaging if a neck mass is present.
- Request fine-needle aspiration, not open excision, for a neck lump.
- Stop tobacco, areca nut and alcohol while being assessed; this improves healing and lowers future risk regardless of the result.
- Keep a dated photograph of any oral or skin lesion so change over time can be documented.
Who should be especially alert?
Risk is not evenly distributed. In North America and Northern Europe, a non-smoking man aged 40–60 with a cystic neck lump should be assessed for HPV-associated oropharyngeal cancer. In South Asia, any persistent cheek ulcer or restricted mouth opening in an areca nut or smokeless tobacco user needs biopsy. In South-East Asia and North Africa, unilateral nasal symptoms and a blocked ear should trigger nasopharyngoscopy for nasopharyngeal carcinoma. In Australia and New Zealand, a non-healing lip, ear or scalp lesion is a UV-related warning sign.
An adult neck lump is considered malignant until proven otherwise. Repeated antibiotics without FNA or imaging is the most frequent cause of diagnostic delay in head and neck cancer.
Frequently asked questions
How long should I wait before seeing a doctor about a mouth ulcer?
Two weeks at most. A traumatic ulcer from a sharp tooth or a bitten cheek usually heals within 10–14 days once the cause is removed. Any ulcer, red or white patch, or lump persisting beyond two to three weeks should be examined and usually biopsied.
Can a painless neck lump be an infection?
Yes — reactive nodes, tuberculosis, lymphoma and benign cysts can all cause a neck lump. But in an adult, especially over 40, a persistent painless or cystic lump requires ultrasound and fine-needle aspiration to exclude a cystic nodal metastasis from HPV-related oropharyngeal cancer or thyroid cancer.
Is a normal dental X-ray enough to exclude cancer?
No. A panoramic radiograph can show jaw involvement or an dental source, but early soft-tissue cancers of the tongue, tonsil, throat or nasopharynx are invisible on plain X-rays. Endoscopy, cross-sectional imaging and biopsy are the relevant tests.
Does a negative biopsy mean I can ignore the symptom?
No. A superficial or poorly targeted biopsy can miss invasive tumour, particularly in a necrotic or mixed inflammatory lesion. If a lump or ulcer persists, the biopsy should be repeated or reviewed by a head and neck pathologist, with imaging to guide a deeper sample.
Sources for this guide
Applying this to your own case?
Start with a remote review of your records, then compare the written plan with the options you have at home.
Records checklist How to compare plansMedical 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.