Swollen lymph nodes, also known as lymphadenopathy or swollen glands, are a sign that something is wrong in your body and that your immune system is fighting an infection or illness
. Lymph nodes are part of your lymphatic system, which helps protect you from germs and other foreign substances
. When lymph nodes become swollen, they can be tender and painful, and they may return to their normal size once the underlying issue is resolved
. Common causes of swollen lymph nodes include:
- Infections from bacteria or viruses
- Upper respiratory infections
- Runny nose, sore throat, and fever
- General swelling of lymph nodes throughout the body, which may indicate an infection
Less common causes of swollen lymph nodes can include:
- Immune or autoimmune disorders, such as lupus or rheumatoid arthritis
- Certain cancers
- Medications that cause swelling
If your lymph nodes do not return to their normal size after several weeks or continue to get larger, or if they are red and tender, hard, or irregular, you should contact your healthcare provider
. In some cases, swollen lymph nodes may indicate a more serious underlying condition that requires further evaluation and treatment
