Lymph nodes are small glands that filter lymph, the clear fluid that circulates through the lymphatic system. During an infection, they accumulate bacteria or dead or diseased cells and may swell.

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.

Swollen lymph nodes may result from an infection or illness. If they last for a long time or occur with other symptoms, you may need medical care. Treatment is specific to the cause of the swollen ...

A swollen lymph node can be a bit like your body’s version of a red flag: When one of these bean-shaped clusters of immune ...

Swollen lymph nodes, or what doctors call lymphadenopathy, are often caused by infections or a condition that affects your immune system. They usually clear up as your body heals. But sometimes ...

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 ...

When most people think of allergies, they picture sneezing, watery eyes, and runny noses—but there’s another symptom that often goes unrecognized: swollen lymph nodes. These small, bean-shaped ...