Neck Knot Under Jawbone: Possible Causes and When to See a Doctor

A lump under the jaw that enlarges when eating can have several causes:

Swollen Lymph Nodes

Lymph nodes fight infection; swelling can result from colds, flu, sore throat, or more serious conditions like cancer.

Thyroid Nodule

A lump in the thyroid gland—common and usually benign, but some can be cancerous. Medical evaluation is essential.

Parathyroid Adenoma

A benign growth on the parathyroid gland that can raise blood calcium, causing kidney stones, bone pain, and nausea.

Neck Lipoma

A soft, movable, painless fatty growth that is non-cancerous.

If you notice a knot under your jaw that changes size with eating, consult a doctor for proper diagnosis, which may include imaging such as a CT scan.