<s>[INST] My son plays football, last week he hurt his hip during the game. It has been bothering him off and on usually after practice. He just played in another game and afterwards he said he thought he knew why his hip hurt. He now has a pretty prominent lump or knot above his left hip bone. It is hard and doesn t really hurt to touch. We have checked the area since he hurt it. Any ideas on what it could be? [/INST] Hi. Thanks for your query. Football is a rash game and your son must have got an injury or fall. The cause of such a hard lump above the hip bone is suggestive of a hematoma as this is hard, not much painful.  I would advise the following in such a situation:Stop playing till the lump is resolved, this is very important. Give him anti-inflammatory medicine like Ibuprofen round the clock. Get an opinion of an Orthopedic Surgeon and ultrasonography guided aspiration and compression bandage. This helps in early recovery. </s>