For example, the lymph nodes in the neck can become swollen in response to an upper respiratory infection, such as the common cold. Lymph nodes swell when an infection occurs in the area where they’re located. Occasionally a lump may require further investigation and a sample may be taken from it (a biopsy) or imaging tests such as X-rays and MRI scans may be undertaken.Swollen lymph nodes are one sign that your lymphatic system is working to rid your body of infection and illness. Your doctor will usually diagnose the lump by a simple examination and prescribe treatment such as antibiotics if necessary. Other symptoms are present such as a temperature, feeling unwell or weight loss.The lump does not move or feels ‘fixed’ behind the ear.The lump remains unchanged after 2-3 weeks.When should I see a doctor?Īlthough the majority of lumps behind the ear are completely harmless and will settle over a few weeks with no treatment, seek medical advice if the following occurs: If other symptoms are present such as a high temperature, headache or feeling generally unwell then an infection is likely. If it is painful to the touch, or tender generally it may be an abscess or infected spot or cyst. If the lump is soft, painless and moves around when you touch it then it is likely to be a lipoma or a simple skin cyst. Skin tag removal, causes and treatment tips It can cause pus-filled cysts to develop behind the affected ear which are felt as lumps. This type of infection is more common in children than adults but is a serious problem requiring medical attention with antibiotics and sometimes assessment by an ear, nose and throat (ENT) specialist. Mastoiditis is a serious ear infection occurs and does not get treated effectively, then the infection may affect the part of the skull bone behind the ear called the mastoid, causing the problem known as mastoiditis. They should be painless and go back to a normal size within 2-3 weeks, usually being triggered by a skin or ear infection in that area (such as otitis media). The lymph nodes behind the ear are called the posterior auricular lymph nodes and if they swell up these are usually felt as small painless pea-sized lumps behind the ear. Enlarged lymph glandsĮnlarged lymph glands are one of the most common reasons for a lump developing behind the ear and is a reaction the body being exposed to potential infection from bacteria and viruses. If this continues then an abscess may form which is painful, warm, tender to the touch and may sometimes discharge yellowish pus. If the white cells accumulate then pus can start to develop, which is a mix of white cells, bacteria, and tissue. This can lead to a build-up of fluid as well as swelling of the area. When cells or body tissues become infected, the body’s natural defences send white cells to that area to help fight off the infection. Compared to a skin cyst, lipomas are usually found deeper in the skin and feel much softer.Įnlarged lymph glands are one of the most common reasons for a lump developing behind the ear. They range in size from pea-size to an inch or two in diameter. If these are very small they may not be felt but if larger you can feel them as a small, soft and mobile lump that is usually painless. Lipomas are completely harmless fatty lumps that develop under the skin and which may occur anywhere on the body. This can cause a lump on the skin which can become infected and inflamed, including behind the ear. In this condition, pores and follicles in the skin become blocked with oil and dead skin which forms a layer called a comedone. AcneĪcne is a very common skin condition, particularly in younger people. Skin cysts are typically mobile and so can be moved from side to side. These are harmless but can occasionally become infected when they can be red, painful and increase in size. These arise from blocked sebaceous glands that produce the oily secretions that lubricate the skin. One of the commonest types are called sebaceous cysts which are often seen on the head, neck and back. Skin cysts are small, fluid-filled sacs that can occur anywhere on the skin and are often caused by blocked skin glands. There are many possible reasons why you may notice a lump behind an ear, including the following: 1. Fortunately, lumps and bumps are usually completely harmless and easily treatable.ĭr Roger Henderson looks at the possible causes for lumps behind your ear, any treatments that may be needed, and when to seek medical advice: What causes a lump behind the ear? Finding a lump on the area of skin behind your ear can cause anxiety.
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