<s>[INST] hi, My 3 yrs old daughter has got lump behind ear since birth, what can it mean, we have told our child secialist about it and he told nothing to woory about as there are lumps in body but its size to be monitored. My baby does not comlain any iching, pain or any thing else. We are worried about it please advice us what should we do? [/INST] Welcome to Chat Doctor. 1. There is a lump behind they are since birth, but doctor said to monitor - probably clinically it was felt like lipoma (fat cell lump), or cystic structure which needs to be monitored.2. If you are concerned with the lump then you need to get an ultrasound scan of the lesion / lump to be done.3. Ultrasound will help in analyzing the nature of the lesion (cystic, solid, mixed)4. Its source (from muscle, bone, vessels) and where are the lesion is extended.5. If necessary an FNAC - fine needle aspiration cytology t identify the cells.6. Depending on the findings, excision can be planned followed by antibiotic treatment. Good luck. Hope I have answered your query.Anything to ask do not hesitate. Thank you. </s>