<s>[INST] I was playing football and got hit on my fibula from the inside of my right leg, 3 cm above from the lower wider portion of the fibula.Now after three weeks there is a small unnoticable lump which is felt only when touched. It aches a little when I walk. What could be causing the lump? Is it anything that requires immediate medical attention? [/INST] Hi. Thanks for your query. Noted the history and understood your concerns. Since only a small lump is remaining after a hit that pains on walking, it is most probably a lump remaining on the muscles or a tendon.Thus, it pans only on waling. It is getting well resolved. I would advise you to consult an Orthopedic Surgeon to see whether this lump is on fibula or tibia or muscle or tendon so that it can be well treated if required with anti-inflammatory like Serratiopeptidase. Do not fondle this. </s>