Hi ! Good morning. I am Dr Shareef answering your query. Even though it is difficult to ascertain the nature of the lump without a physical examination of the lesion, from your description, it seems that it is a benign lesion possibly due to a unnoticed chronic irritation by the chipped teeth causing a papilloma (excess growth of the soft tissue). I would advise you to take appointment with a dentist and a general surgeon together who can opine on the cause and further management by a physical examination and related investigations like a possible biopsy of the lesion. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.