Nodule

Fluid-filled or solid lump that doesn't usually mean anything serious is wrong.

When to seek immediate medical care

See a healthcare professional immediately if:

• A new lump or mass appears.
• Sudden weight loss.
• Heartbeat is not regular.
• Trouble sleeping.
• Hard time breathing or swallowing.

When to make a doctor's appointment

Make an appointment with a healthcare professional if:

• An existing nodule changes.