Health Tip: Why You May Have Swollen Lymph Nodes

(HealthDay News) -- If you notice swollen areas around your neck, behind your head or ears, or under your arms, you might be feeling swollen lymph nodes. Lymph nodes are a key line of defense against infection.

The U.S. National Library of Medicine offers this list of possible reasons for swollen lymph nodes:

  • An ear infection.
  • The gum disease gingivitis.
  • A tooth that is impacted or abscessed.
  • Mononucleosis.
  • A sexually transmitted disease, including HIV.
  • Tonsillitis.
  • Sores in the mouth.
  • Tuberculosis.
  • Rheumatoid arthritis.
  • Certain cancers, such as leukemia, Hodgkin's disease or non-Hodgkin lymphoma.