Lump in top of my leg.

What's your question: "lump in top of [my] leg" could be due to many things. If you're describing groin area where thigh joints pelvis, this might be a hernia or swollen lymph node (gland). Hematoma or bleeding could do this. Infection, too, even abscess, if red & painful. Severely broken bone but i think you'd have a pretty good idea of that. Hives? But those are temporary & itchy. Pain? Go see your family doc.