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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.
Ear pain/fullness vertigo.small pea size bump behind ear not painful. 7. Get help from a doctor now âº. Allergies: You may have allergies .The mucus produced has gone into your middle ear giving you fullness and vertigo as well as pain.theseelling about yourear represents a small reactive lymph node.