Lump on the back of the shoulder near the neck

This junction contains muscles, connective tissue, skin, and lymphatic structures. Strain or muscle spasm may create a tight, tender area that changes with shoulder movement. A cyst or fatty lump can sit under the skin, while a lymph node may become noticeable when nearby skin or throat tissues are irritated. Location and discomfort alone cannot identify which structure is involved.

A clinician will compare both sides, feel the lump and surrounding tissue, and check the neck, skin, throat, and lymph nodes. If the findings warrant it, tests may investigate conditions including [Head and Neck Cancer](/conditions/head-and-neck-cancer/) or [Lymphoma](/conditions/lymphoma/). A referral for assessment does not mean one of these conditions has been diagnosed.

Note whether the lump changes with shoulder elevation, neck movement, or rest. Record its size, firmness, mobility, tenderness, skin color, and how long it has been present. Consider recent lifting, exercise, injury, vaccination, skin irritation, infection, or dental and throat symptoms, and share that context at the visit. Avoid deep massage, squeezing, or self-treatment that makes the area more inflamed. Arrange review for a persistent or growing lump.

Seek urgent care if the swelling rapidly worsens, breathing or swallowing becomes difficult, severe pain develops, or fever accompanies spreading redness. Prompt clinical review is appropriate for a hard or fixed lump, continued enlargement, persistent fever or night sweats, unexplained weight loss, or new weakness or numbness in the arm. These features require timely evaluation rather than self-diagnosis.

Ask whether the lump feels muscular, skin-based, lymphatic, or deeper; whether movement findings change the assessment; and whether imaging or tissue sampling is suitable. Ask what activity is safe, how to document change, and when to return if the lump remains after a suspected strain or infection.