Lymph nodes are part of the body’s immune system. A swollen lymph node in the armpit may be a sign of a bacterial or viral infection, an injury, or a serious health condition, such as cancer.

When a person has an infection, they may notice swollen lymph nodes in part of the body near the infection site, such as their neck, armpit, jaw, or groin. Cancer that develops in or spreads to ...

Swollen lymph nodes in your neck, armpit, head, and other parts of the body often occur when your body is fighting an infection or disease. Lymph nodes filter fluids from the lymphatic system.

Armpit pain is a common complaint that can have many causes, from mild muscle injuries to swollen lymph nodes and severe skin infections. In most cases, armpit pain isn't a reason to worry ...

If lymph nodes become swollen and painful, it could be a sign that you’re fighting an infection such as: Place a warm, wet washcloth under your armpit over the tender area. Take over-the ...