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

A large painful lump on the back of the neck should be assessed promptly when pain, swelling or associated symptoms are worsening. Pain may accompany infection or inflammation, but it does not by itself show whether a lump is cancerous or benign.

The back of the neck contains lymph nodes, skin and soft tissue. A painful lump may be related to a nearby infection, an inflamed cyst, skin irritation or another local process. A neck lump can also be a presentation of head and neck cancer or lymphoma, although pain alone cannot identify the cause. The clinician will consider redness, warmth, tenderness, drainage, firmness, mobility, growth and symptoms such as fever, sore throat or scalp changes.

Arrange medical review and note when the lump and pain began, whether the area is hot or red, and whether the swelling is changing. Do not squeeze, puncture or massage it. Avoid applying new creams unless advised. Tell the clinician about recent infections, skin breaks, dental or throat symptoms, medicines and any previous cancer diagnosis. Examination may lead to treatment for an infection, monitoring, imaging or tissue testing, depending on the findings.

Seek urgent help for trouble breathing or swallowing, rapidly expanding swelling, severe pain, spreading redness, pus with feeling very unwell, neck stiffness with fever, or faintness. Seek prompt assessment if the lump persists, becomes hard or fixed, or is accompanied by ongoing fever, drenching night sweats, hoarseness or unexplained weight change. These warning features guide urgency but do not establish a diagnosis.

Ask whether the lump appears to be in a lymph node, skin or deeper tissue; whether infection is likely; and whether you need imaging or a biopsy. Ask how to manage pain safely, which changes should trigger urgent contact, and when the lump should be checked again if it does not settle.