Lump back of neck behind ear: what to know

The area behind the ear contains lymph nodes and lies beside skin, muscle, and connective tissue. A nearby infection affecting the scalp, ear, throat, or skin can make a lymph node enlarge and feel tender. A blocked skin gland, cyst, or other non-cancerous growth can also form a bump. A neck lump can sometimes be a presentation of head and neck cancer or lymphoma, but the lump itself does not establish that diagnosis.

Notice whether it is painful, warm, red, soft, firm, mobile, or fixed. Record when you first found it and whether it changes after an illness. These details help a clinician decide whether observation, imaging, or another test is appropriate.

Do not squeeze, repeatedly press, or try to drain the lump. Check it gently no more than occasionally, and note its size in relation to a familiar object rather than measuring it repeatedly. Arrange a primary-care or specialist appointment if it persists, grows, returns, or has no clear link with a recent infection. The clinician may examine your ears, scalp, mouth, throat, and neck, then choose tests based on the findings.

Seek prompt medical attention for a lump that is rapidly enlarging, hard and fixed, persistently present, or accompanied by unexplained weight loss, drenching night sweats, or ongoing fever. Get urgent help for trouble breathing or swallowing, marked weakness, severe pain, or swelling with spreading redness. A symptom’s presence does not show that it is cancer; urgency depends on the warning signs and how you feel.

Ask: Which structures could be causing this lump? What changes should I monitor? Would an ultrasound or another test clarify its nature? If a thyroid or neck cause is suspected, what would the next step be?