<s>[INST] I have a small, moveable lump under the skin on the left side of my lower jawline/chin, but not in my gums - moreso in my cheek. It is slightly tender to the touch. No ear ache, no fever, no sore throat, and no swollen glands. Teeth are not sensitive either. I just noticed it this morning, not sure how long it has been there as it is not sore when not being touched. Area is slightly swollen since I have been playing with it trying to figure it out. What are the possibilities of this? [/INST] Welcome to health care magic. 1.The most possible cause of the swelling in the location mentioned by you could be - submandibular gland ductal enlargement.2.This can be due to and obstruction / or gland lesion - sailoadenitis.3.In this case you may initially advised for a simple facial massage followed by the investigations if required.4.The investigation of choice in this case could be ultrasound to assess weather dilated duct or gland, its extensions and source - presence of any obstruction.5.IT always good to get examined by a doctor - if the doctor feels to further investigate good, if not required them monitor - if any changes you can take needful actions.Good luck.Hope i have answered your query,any thing to ask ? do not hesitate to ask. </s>