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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.
Located all over the body, they are found in armpit, groin and back ear areas. The swelling of small bumps behind your ears could be as a result of swollen lymph nodes. You can feel these swell up when you have common infections such as tonsillitis, mono, colds and flu. These could remain swollen for a number of days or even weeks. Note: rarely do cancers and tumors cause lymph node swellings.