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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.
If your child develops a fever and a swollen face, or swelling behind the ear, call the doctor or go to an emergency room immediately: This could signal a serious infection. Why does my child get so many ear infections? The eustachian tubes in infants and toddlers seem tailor-made to encourage ear infections.