Reoccurring Lipoma and getting infected - root cause? (photo)

I had lipomas across my body (varied sizes). a year back, i had an infection in the thigh lipoma (in inch dia) & got it operated. again there was fat accumulation in the same place and lipoma recurred. A month back again it got infected & i had another surgery in same place. a hole was left to drain the fluid/ collection. it had healed & was pressing it in perimeter to see if collection is there. I guess i pressed too hard and it got infected again. I am unable to understand the root cause.