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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.
What is ear swelling? The sensation of swelling in, on or around your ear may cause it to feel warm, inflamed and tender. Many causes of swelling and inflammation are attributed to an infection, which occurs when bacteria, viruses or other microorganisms enter your body. Your immune system mounts a response to the microorganisms.