Painful pea-sized lump in the neck: what to know

Tenderness may occur when a lymph node responds to an infection in the throat, ear, teeth, or skin. The timing matters: a lump noticed during a sore throat or dental problem may behave differently from one that remains after the illness settles. Pain does not prove that a lump is harmless, and lack of pain does not prove that it is serious. Head and neck cancer, lymphoma, thyroid cancer, and cancer of unknown primary can present with a neck lump, but only an assessment can distinguish causes.

A clinician may check the lump's texture and movement, look for an infection, and examine the mouth, throat, ears, and thyroid. Further tests depend on those findings.

Track the lump's size, tenderness, and movement without squeezing it. Note fever, sore throat, dental pain, skin changes, voice change, swallowing difficulty, night sweating, or unexplained weight change. Seek an appointment if it does not settle after the associated problem improves, keeps enlarging, or has no clear explanation.

Get urgent help for breathing difficulty, inability to swallow saliva, rapidly worsening swelling, or severe infection symptoms. Arrange prompt review for a firm or fixed lump, continued growth, persistent hoarseness, swallowing difficulty, unexplained weight loss, or drenching night sweats.

Ask whether the pain fits a nearby infection, which symptoms should prompt earlier review, whether the lump needs imaging or sampling, and what change in size or tenderness should be reported.