hi! i'm eff. 26 yrs. old female, I have this big (size of a coin) firm/hard lump behind my ear, slightly at the lower part, almost near the corner of my jaw. almost 3 months ago i had tooth extraction, and the infection made my lymph nodes swell. After 2-3 weeks it subsided, (not totally disappeared) and then the next two months it became bigger, painful at first, but now it stayed big and no pain anymore... i'm really getting worried if it's malignant. please help me. reply if u have any advices or ideas. thank you so much! :l