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.