Lymph nodes are small glands that play a crucial role in the body’s immune system. They help filter out bacteria, viruses, and other foreign substances from the lymph fluid. When lymph nodes become swollen, it can indicate an infection or other medical condition.
There are many lymph nodes located throughout the body, including in the neck, armpits, groin, and chest. Swollen lymph nodes can occur in one area or multiple areas of the body, depending on the underlying cause.