The lymphatic system plays a key role in fighting off infection and disease. Bacteria and other toxins are filtered through small glands known as lymph nodes that are located throughout the body, including high concentrations in the head and neck. When infected, they can swell, causing soreness and pain when swallowing. If you're experiencing a sore throat, you may also have swollen glands. The causes can be both minor and severe, ranging from acute infection to cancer. If your lymph nodes don't go back to normal, consult your doctor for further evaluation.

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