Lymph nodes are vital to the immune system, filtering lymph fluid to remove germs and waste. They often swell during infections as they work to fight pathogens, which is usually a sign of a functioning immune system.

When to See a Doctor
You should consult a doctor if:

Swelling lasts over two weeks.
You experience unexplained fever, weight loss, or persistent pain.
A lymph node grows rapidly, feels hard, or multiple nodes are swollen in different areas.
Diagnosis and Treatment
Doctors may perform physical exams, imaging, or biopsies to determine the cause. Treatment depends on the underlying issue:

Infections: Antibiotics or over-the-counter pain relief.
Inflammatory conditions: Medications to manage symptoms.
Cancer: Chemotherapy, radiation, or surgery may be required.
Key Takeaway
If a lymph node is swollen and doesn’t improve or is accompanied by other symptoms, seek medical attention promptly.