Hi ! Good afternoon. I am Dr Shareef answering your query. From your description of the swelling, it seems to be a benign cyst (like a sebaceous cyst) with super added infection. This of course would need confirmation by a physical examination and if required an excision biopsy. Therefore, I would suggest you to get it assessed by a general surgeon who could further do proper management 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.