Conversation: The conversation between human and AI assistant.
[|Human|] I hit my left side on the edge of a chair and now I have a lump that is very painful if I stretched or extended my left arm. I started sleeping with a heating pad and the pain of extending my arm is somewhat gone but not the total discomfort. Will the lump eventually go away or should I visit my physician?
[|AI|]  Hi! Good evening. I am Chat Doctor answering your query. From the history, it seems that the lump you developed could be due to a hematoma (collection of blood) formation in the part due to the trauma. Under normal conditions, it might get absorbed which could take some time. In case of persistence of the lump for a longer duration, you could get it clinically assessed by your family physician/orthopedic surgeon for appropriate 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 Chat Doctor to clear doubts on your health problems. I wish you an early recovery. Chat Doctor.