Can Allergies Cause Swollen Lymph Nodes?

Yes, allergies can cause swollen lymph nodes, though it's less common than with infections. When your immune system responds to allergens like pollen, dust mites, or certain foods, it can trigger inflammation that affects nearby lymph nodes. This typically occurs in nodes close to the exposure site—neck nodes may swell with respiratory allergies, while armpit or groin nodes might react to skin allergies. Studies show that about 15-20% of people with severe seasonal allergies experience some degree of lymph node swelling. The swelling is usually mild, painless, and resolves when the allergic reaction subsides. However, persistent or painful swollen lymph nodes warrant medical evaluation to rule out other causes.

Related Questions

• How long do swollen lymph nodes from allergies last?

• What's the difference between allergy and infection lymph node swelling?

• When should I see a doctor for swollen lymph nodes?

• Can food allergies cause lymph nodes to swell?

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