A lump behind the ear can have many possible causes. The most common include swollen lymph nodes caused by an uncomplicated infection. These lumps are typically harmless and relatively easy to treat.

Although swollen lymph nodes behind the ear are more common due to the location of lymph nodes in the neck, some people will ...

Discover how allergies can cause swollen lymph nodes, and learn to distinguish between normal immune responses and warning ...

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.

For example, lymph nodes behind or under the ears may swell when a person has ... Less common causes of swollen lymph nodes include: metastatic cancer, which is cancer that has spread from its ...