Does head and neck cancer cause swollen lymph nodes?

Lymph nodes help filter fluid and coordinate immune responses. A tumour in the mouth, throat, voice box, nose, or nearby structures may spread to regional nodes, making them feel enlarged or firm. A recent sore throat, dental infection, skin irritation, or viral illness can also cause swelling. The location, texture, growth pattern, and other symptoms matter more than the swelling alone.

A node that persists, grows, feels hard or fixed, or appears with a neck mass, persistent hoarseness, trouble swallowing, mouth changes, or unexplained weight loss deserves clinical assessment. Examination may include looking inside the mouth and throat, feeling the neck, and arranging imaging or a needle sample when appropriate.

Arrange an appointment if a swollen node does not settle after an apparent infection or if you cannot identify a recent cause. Note when it began, whether it is changing, its position, and symptoms such as ear pain, voice change, swallowing difficulty, or a persistent mouth sore. Do not repeatedly press or massage the area, because that can make it more tender. A clinician can decide whether observation, infection testing, imaging, or referral is suitable.

Seek urgent medical help for difficulty breathing, inability to swallow liquids, rapidly increasing neck swelling, or swelling with severe weakness. Contact a clinician soon for a persistent neck lump, coughing or hoarseness that does not improve, bleeding from the mouth or nose without a clear explanation, or worsening pain. These signs do not diagnose cancer, but they should not be left unexplained.

Ask which lymph-node features are concerning, whether an infection or dental problem could explain the swelling, and how long monitoring is reasonable. You can also ask whether you need an ear, nose and throat assessment, imaging, or a biopsy, and which changes should prompt an earlier review.