<s>[INST] Hi, i m almost 18 and have a hard blue bump on my shoulder, at first i thought it was just a bruise but now it has turned into a lump/bump. it doesn t hurt so much ( only if i push it ) it feels like a bone, but in circle version. I also have little sores or rashes on my knees a long with flu, and a litlle dizzyness please help?? [/INST] Hi I am Chat Doctor and I will help you with your query have through your question. Need more information to reach a diagnosis_ any history trauma on that side?_ can skin moves over the swelling?_ Far how long it was there and how you first noticed it?_ How is progressed over a period of time?Anyhow, from the available information it appears to be bruised + hematoma formation. Local treatment like icing, steroid ointment application along with tab paracetamol 2 tabs 8 hourly will help. It will resolve completely in few weeks. Do come back with answers of the above questions for better understanding of the problem. I hope my answer will help. Do rate it, if you like it. Regards </s>