It could be an infection, a vaccine response, or an autoimmune disease symptom, per experts.

The last time you visited your doctor for a sore throat, they may have felt for potential inflammation in your neck. That's because infections often cause swollen lymph nodes (medically known as ...

Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. The lymphatic system helps the body fight infection and filter harmful substances. Lymph nodes are present ...