What are lymph nodes in the neck, and what role do they play in the immune system?

Question

I’ve noticed some swelling in the lymph nodes in my neck, and I’m worried it might indicate an infection or something more serious. I don’t fully understand what lymph nodes do or why they swell.

What exactly are lymph nodes in the neck, and what role do they play in the immune system? I know they filter out harmful substances like bacteria and viruses—how do they help protect the body from infections and diseases? Also, what causes the lymph nodes to become swollen, and when should I be concerned about it?

I also want to understand how swollen lymph nodes are treated. Does it always mean infection, or can they swell due to other causes like cancer or autoimmune disorders? How do doctors diagnose the cause of swollen lymph nodes, and what tests or treatments are involved?

If anyone has had issues with swollen lymph nodes, what was the cause, and how did it affect your health? Did you need medical treatment, or did the swelling go down on its own?

Dr. Harsha Joy · Accepted Answer

Lymph nodes are small, bean-shaped structures located throughout the body, including the neck, and they are key players in the immune system. Their primary function is to filter lymph fluid, trapping harmful substances like bacteria, viruses, and cancer cells, while also producing immune cells to help protect the body. When the body is fighting an infection or dealing with inflammation, lymph nodes can become swollen as they work to filter out these pathogens. Swollen lymph nodes often signal an infection, but they can also be a sign of other conditions, such as autoimmune disorders or, in rare cases, cancer. If the swelling persists, is painful, or is accompanied by fever, weight loss, or other concerning symptoms, it's important to seek medical advice. Diagnosis may involve blood tests, imaging, or a biopsy to determine the cause. Ayurvedic remedies may focus on strengthening the immune system through herbs, proper diet, and detoxification, though medical treatment is often necessary for serious underlying conditions.

What are lymph nodes in the neck, and what role do they play in the immune system? - #14780

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