Hi! Good morning. I am Dr Shareef answering your query. If I were your doctor, I would first advise you not to poke on the lump as it would increase the chances of recurrent infections and might increase the lump. I would prescribe a broad spectrum antibiotic along with an anti inflammatory and a proton pump inhibitor drug which might heal the ulcer formed. An anti septic cream might also be added to it. Considering your poking the lump with a safety pin, I would also verify your immunisation status for tetanus, and give a shot of anti tetanus vaccine if needed. In case the lump goes on increasing, I would advise you to see a general surgeon in your area for a clinical assessment to rule out any other missed diagnosis/pathology in the lower lip. 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. I wish you an early recovery. Dr Shareef.