Can you tell me what is the cause of the swollen lymph node at the back of my ear?

Monitoring Centers. Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.

Related Questions

I've had a swollen lymph node behind my ear for years. Now it is getting larger. I have found 3 more on my other eye and on the back of my neck. When?

Lymph nodes. I'm not sure what you're asking, but you should go see your doctor promptly!! Read more...
Lymph nodes enlarged. Any weight loss or night sweats. Are you a smoker. Enlarged lymph nodes in short term may be due to an infection. However if getting enlarged and increased in number MUST be investigated. An excision biopsy can answer many questions. See a good ENT (EAR NOSE AND THROAT) doctor. Chronic infection, sinuses or inner ear etc? CT of head and neck and or panendoscopy by ENT also may be needed. . Read more...

I have a swollen lymph node in my neck right below my ear is it cause for concern?

Get it checked. several possibilities....see an ENT ....could be the result of a long standing infection, could be one of your posterior molar teeth has abscessed. Read more...

Pain behind my ear. I try to feel of there are any lumps but don't feel anything. Is it possible to get a swollen lymph node without any lumps?

No. Swollen lymph nodes indicate the presence of a lump. If there is pain behind ear consider the mastoid as the site from which the pain arises. This area should be checked by an ENT doctor. The other structure just behind the ear can be tail of parotid and this structure should also be checked if pain persists. Read more...