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Lymphadenopathy is a condition where the lymph nodes, small round organs found all over the body, begin to swell, which could cause painful lump behind ear. The swelling is caused by accumulation of immune cells within the lymph node.
There are many reasons why a lump could occur behind your ear. Understanding the causes of such a lump is crucial because there are minor and serious bumps. Simple problems will often disappear on their own while complex cases require professional medical treatment.