Enlarged lymph nodes are often swollen due to an infection from bacteria or viruses. The lymph nodes help the body fight infections by filtering viruses and bacteria before they can infect other areas.
How Lymph Nodes Become Enlarged
The lymph nodes are small groups of cells that filter the lymphatic fluid as it travels through your body. They help protect you from germs and infection. They are located in groups, each of which drains a certain area. When the lymph nodes themselves become infected, they swell and become enlarged.