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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.
Many causes of swollen lymph nodes behind the ear are not serious in nature as they are simply a result of the lymph nodes doing their job and fighting off infection. But some causes can be quite serious, and so itâs important to know when you should have your swollen lymph node looked at more closely.