A rash accompanied by swollen lymph nodes usually stems from a viral infection ... bull’s-eye rash may be one of the first signs of Lyme disease. HeikeKampe/ iStock Lyme disease is caused ...

Lyme disease is a bacterial infection caused ... headache, body aches, and swollen lymph nodes in the neck and armpits.

When allergies cause swollen lymph nodes, you'll typically notice a pea-sized (1-2 centimeter) tender lump under your skin, usually in your neck, behind your ears, or under your jaw or chin.

When allergies are the culprit, swollen lymph nodes typically appear as small, movable lumps about the size of a pea or bean under the skin, most commonly in the neck area, behind the ears ...