What should you know about a large lump on the back of your neck?

A large lump on the back of the neck should be examined, particularly when it persists, enlarges, feels firm or comes with other symptoms. Its location may involve a lymph node, skin or soft tissue, and the appearance alone cannot establish a diagnosis.

The back of the neck contains lymph nodes and layers of skin, muscle and soft tissue. A lump may follow a nearby infection, irritation or cyst, or it may be another benign mass. A posterior neck lump can also be a presentation of lymphoma or head and neck cancer. The examination considers whether it is tender, warm, mobile, hard, attached to deeper tissue, or changing over time. A clinician may also inspect the scalp, mouth, throat and thyroid.

Book a medical appointment and write down when you noticed the lump, whether it has grown, and whether you have had recent infection, skin inflammation, fever, night sweating, tiredness or weight change. Avoid trying to drain, massage or puncture it. Bring a list of medicines and relevant medical history. The clinician may recommend observation for a clearly minor cause, or may arrange imaging and tissue testing when the examination warrants it. A suspected thyroid or lymph-node source may change which specialist is involved.

Get urgent help for breathing difficulty, trouble swallowing, rapidly increasing swelling, severe pain, spreading redness, or feeling acutely unwell. Arrange prompt assessment for a lump that remains or grows, is hard or fixed, or occurs with persistent hoarseness, unexplained fever or drenching night sweats. These signs call for timely evaluation; they do not prove that the lump is cancer.

Ask what tissue the lump may involve, whether nearby lymph nodes look enlarged, and whether you need an ultrasound, other imaging or a biopsy. Ask how long results may take, which changes should trigger earlier contact, and whether symptoms elsewhere in the head or neck alter the assessment.