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 the body fights an infection or injury, lymph nodes sometimes swell. Doctors call this a reactive lymph node. Treatment can depend on the cause. Lymph nodes house white blood cells.

Swollen lymph nodes can crop up when your body is fighting many different kinds of infection or illness. First, a little ...

Allergy symptoms may include a runny nose, congestion, coughing, wheezing, itching, and sometimes, swollen lymph nodes. Lymph nodes are small, bean-shaped organs that help remove harmful ...

Swollen glands in the neck, which are actually enlarged lymph nodes, are a sign that your body is trying to fight an infection or autoimmune disorder. Conditions that may cause swollen glands in ...