These lumps are lymph nodes or glands that are located all over the body, including behind the ears, and contain immune cells ...

A lump behind the ear can have many possible causes. The most common include swollen lymph nodes caused by an uncomplicated ...

Sometimes, lymph nodes can swell because of cancer. Lymph nodes usually swell near the site of the injury. For example, lymph nodes behind or under the ears may ... causes of swollen lymph nodes ...

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 ...