Swollen Lymph Nodes
Lymph nodes, sometimes called lymph glands, are an important part of theimmune system. Within lymph nodes are white blood cells calledlymphocytesthat help neutralize foreign agents like bacteria and viruses. Swollen lymph nodes are a sign that the body is fighting an infection or disease. dardespot / Getty Images Some diseases can also directly affect lymph nodes, including cancers likelymphoma. dardespot / Getty Images What Are Lymph Nodes? Lymph nodes are small, bean-shaped organs that are part of the lymphatic system....