<s>[INST] Hi, my mum has a pea sized lump on the left side of her neck which appeared around 3 months or so ago. She had it checked out by the doctor who said it wasn't a problem and gave her antibiotics. However it is still there and has started to become painful now. I am worried as to what it can be...any suggestions? [/INST] welcome to Health care magic.1.Most common lesions / lumps in the neck are lymph nodal enlargement.2.The lymph nodal enlargement is seen after some inflammation / infection, and underlying systemic diseases and malignancies.3.I would suggest you to see your doctor and get an ultrasound scan neck done, to confirm that its lymph node or some thing else ( lipomas, vascular lesion)4.It will also help to make out where the lesion is extending from.5.A FNAC needs for confirmation ( fine needle aspiration cytology)6.Better to get evaluated as soon as possible before it get complicated.Hope it helps you. Wish you a good health.Anything to ask ? do not hesitate. Thank you. </s>