I’m having a hard lump with a uncomfortable pain on the left side of my belly right next to my belly button,it feels weird like hard and it push’s when I walk,it’s not blue of read.It just appeared.I’m concern of fat necrosis since it is hard and at the moment I don’t know if it is swelling or if it is that big.My question is what are the symptoms of fat necrosis? Does it pains? And how can it be diagnose echo,MRI? Does it goes away? How to treat it?