<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have a small lump under the left side of my jaw that I can move to the outside of my jaw. Its a little sore but nothing unbearable. My mom says she gets thoses sometimes too. I ve had this same lump before on the same side but they have always gone away after awhile. Any idea of what this is.  <response>: Hi, dear. I have gone through your question. I can understand your concern. You may have some reactive lymph node or salivary gland inflammation. You just need a course of antibiotics. Mostly your lump will go away. If it doesnt respond to treatment then biopsy diagnosis is advisable. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. 