Thanks for writing in,
A pellet sized small lump, just felt in the thigh without pain or any other signs or symptoms is mostly a simple lipoma
. But a physical examination is needed to confirm it.Sometimes it runs in family also.
Nothing has to be done. Just wait and watch. If the swelling increases in size or causes some difficulty in routine activities, or causing some tingling sensation
, or if it gets infected / painful to touch etc. then you can get it removed.
Get well soon,