Lumps Behind the Ears

Mohd Salman   by Mohd Salman, MD, Internal Medicine    Last updated on February 17, 2021,

lump behind ear

What is a Lump Behind Ear?

A lump behind an ear is usually an indication of a localized area of swelling of certain glands called retro auricular lymph nodes or posterior auricular glands which are a small group of lymph nodes, usually two in number, located just beneath the ear. Swelling in these lymph nodes can result in the formation of one or multiple lumps that can occur not just behind your ear but other part of your ear as well such as your earlobe or your ear canal. Sometimes a lump behind ear is also described by other names such as a bump, cyst, nodule and a tumour.

Usually, lumps behind ear have a tendency to swing both ways. They can either be very painful or completely painless. They can appear in all sizes either big or small. They can be both soft and firm on touch.

These lumps behind the ear maintain their size all throughout. In some cases they can grow larger as well either very rapidly or very slowly. However, the lumps behind the ear rarely grow larger than the size of a pea. They either appear as single lump or multiple lumps growing in the form of a cluster.

Most cases of lumps behind the ear do not present a cause of concern and resolve without any treatment however in some cases you may need to visit your doctor especially if the lumps are persistent and painful.

What are the causes of a lump behind the ears?

Lumps behind ears are usually harmless and a common occurrence. They are not an indication of something serious in most cases. Several skin conditions can be associated as cause of a lump behind the ears which includes:

  • Infection
  • Mastoiditis
  • Abscess
  • Otitis media
  • Lymphadenopathy (secondary to ear or throat infections)
  • Sebaceous cysts
  • Acne vulgaris
  • Lipoma


A lump behind the ears may be a result of a bacterial and viral infection which cause swelling in and around your neck and face. Examples of such infections are strep throat and infection with Epstein-Barr virus. Other conditions such as AIDS, measles, and chickenpox can also cause swelling in and around your neck and face leading to appearance of a lump behind your ear. 


An untreated infection of your ear may develop into a more serious ear infection known as mastoiditis. In case of mastoiditis a bony protrusion called as mastoid develops behind your ear. It may cause pus-filled cysts to develop which appears to you as a lump or knot behind your ear.


When a tissue or cells in an area of the body become infected it presents itself in the form of an abscess. As a result of defence mechanism your body tries to kill off the invading bacteria or virus. During this process your body sends white blood cells to the infected areas to fight the infection causing bacteria or virus. As more and more of white blood cells begin accumulating in the infected area, it results in pus formation there. This pus filled area may appear to you as a lump behind your ears. Abscesses are often warm to touch and painful.

Otitis media

Otis media is another term for an ear infection either by a bacteria or virus. It causes painful swelling and fluid build up at the infection site. These infections may result in visible swelling or lump behind your ear.

Lymphadenopathy (secondary to ear or throat infections)

Lymphadenopathy is the disease of your lymph nodes where they become abnormal in size, number, or consistency. Lymph nodes are very small, organ-like structures that are present throughout your body such as under your arms, in your neck, in your pelvis, and behind your ears. Many times these lymph nodes swell in a natural response to an infection. As the number of cells fighting the infection increases they begin to build up in the lymph nodes. Conditions such as inflammation and cancer can also cause your lymph nodes to swell which may appear as lump behind the ears.

Sebaceous cysts

Sebaceous cysts can occur anywhere in the skin around sebaceous glands including behind your ears as noncancerous bumps beneath the skin. The most frequent places where they develop include the head, neck, and torso. Sebaceous glands are responsible for producing oil that lubricates your skin and hair. Although they may be uncomfortable and irritating but most sebaceous cysts cause little to no pain.

Acne vulgaris

When hair follicles in the skin become clogged they lead to a common skin condition known as acne. The follicles may get clogged by dead skin cells and oil which appear as pimples and bumps. In some cases, these bumps may grow to be large, solid, and painful.


A lipoma can develop anywhere on your body. It is a harmless, fatty lump that develops between the layers of your skin. Lipomas are usually not get detected from the skin’s surface, but you will be able to feel them with your hand as they grow larger.

Usually the lumps or bumps behind the ears caused by sebaceous cysts, lipoma, benign tumours and malignant cancers are found to be painless while the lumps behind the ears that are caused by abscess, dermatitis, mastoiditis, acne and Otitis media are quite painful.

How you can diagnose a lump behind an ear on your own?

There are some kinds of lumps behind the ears that require medical attention, while some are harmless and resolve without any treatment. However, it is always recommended to visit a doctor when you notice a lump behind the ear. You can detect these lumps by using your hands. Below are some tips to decide what such a lump could be.

  • If the lump feels soft and pliable, most probably it may be a lipoma.
  • If the lump is painful and tender on touching then it could be a pimple or an abscess.
  • If you feel the lump to be inflamed and it feels warm and painful, it could be caused by an abscess.

When to visit a doctor?

Generally lumps or bumps behind the ears are quite harmless and resolve on their own. However you should seek medical attention if:

  • Your lump is persistent for beyond two weeks, even though it is painless.
  • The lump is too painful and causing you discomfort.
  • You are unable to move your head or your neck.
  • You find difficulty in swallowing.
  • You feel the area of lump is spreading or growing.
  • The swelling behind the ears gets inflamed, begins to leak out pus, or ruptures on its own.
  • The symptoms accompanying the lump do not lessen over time or are getting worse.