Swollen lymph nodes in the neck are often harmless signs of an illness, but they can occasionally signal something more serious. Here’s what you need to know:

**What Are Lymph Nodes?**
Lymph nodes are small, bean-shaped structures that filter lymph fluid, removing germs, waste, and cancer cells. Swollen nodes usually indicate the immune system is fighting off an infection.

**When to Worry:**
Swollen lymph nodes may require medical attention if:
– Swelling lasts longer than two weeks.
– You experience fever, weight loss, or unexplained pain.
– A node grows quickly, feels hard, or spreads to multiple areas.

**What Doctors Do:**
To investigate swollen lymph nodes, doctors perform a physical exam, review your medical history, and may order imaging tests or a biopsy.

**Treatment Options:**
Treatment depends on the cause:
– **Infections:** Antibiotics or over-the-counter pain relief.
– **Inflammatory diseases:** Immune-suppressing medications.
– **Cancer:** Chemotherapy, radiation, or surgery.

**Conclusion:**
Swollen lymph nodes are usually harmless, but persistent or concerning symptoms warrant a doctor’s visit to ensure timely care.