What should you know about a small red lump on the neck?

Redness, tenderness, warmth, or drainage can occur when the skin is inflamed. A lump deeper under the skin may be a lymph node responding to a nearby throat, ear, dental, or skin problem. A thyroid or other neck mass can feel different and may not be red. A neck lump can also be a presentation of head and neck cancer, lymphoma, thyroid cancer, or cancer of unknown primary, but a lump does not establish any of these diagnoses.

Do not squeeze, pierce, or repeatedly press the area. Note when you first noticed it, whether it changes in size, and whether redness spreads. Arrange a clinical examination if it persists, returns, grows, feels fixed, or has no clear explanation. The clinician may inspect the skin, mouth, throat, and thyroid area and decide whether observation, imaging, or a sample is appropriate.

Seek urgent medical help for trouble breathing or swallowing, rapidly spreading redness, severe pain, high fever, faintness, or heavy bleeding. Arrange timely assessment for a persistent lump with voice change, unexplained weight loss, night sweats, or a lump that becomes hard or firmly attached.

Ask what structures lie beneath the lump, whether nearby infection could explain it, what changes should be monitored, and whether you need an ultrasound or other test. If a thyroid cause is considered, ask what the examination and follow-up plan will involve.