Hi ! Good morning. If I were your doctor, after a clinical examination of the lump, I would refer you to a general surgeon or your original operating surgeon to investigate you thoroughly on the lump apart from treating the infection which could be due to a undesolved suture of the previous surgery, a known problem with some. Till then, I would advise you for a broad spectrum antibiotic along with an anti inflammatory and a proton pump inhibitor, and a regular sterile dressing. 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.