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.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." You might experience swollen lymph nodes—small, bean-shaped glands throughout your entire body—on your ...

Justin Stebbing does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...

The popliteal lymph nodes lie in the tissues behind a person’s knee. Infections and autoimmune conditions can cause them to swell. It is rare for cancer to affect the popliteal lymph nodes. According ...

Cancer that starts in the lymph nodes is lymphoma. Cancer may also spread from other areas of the body to various lymph nodes, including the neck. Swollen lymph nodes are usually due to a cause other ...