Hi! Good evening. i am Dr Shareef answering your query. Even though it needs a clinical examiantion, from the history it seems to be a hematoma (collection of blood) in the subcutaneous tissue resulting from the bump. Usually small hematoma would get absorbed by itself and nothing more might have to be done. If I were your doctor, I would prescribe you with an anti inflammtory along with a proton pump inhibitor and ice-soakages for some time for a symptomatic relief. If it increases, then you might have to see a surgeon for further opinion and management. 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.