10 days ago, I had a 5 cm round lipoma removed from the front waist area next to the left ilium. 3 days after the procedure, a swelling developed in the area. The surgeon drained the seroma twice but the swelling is a bit hard and very pronounced. It is less pronounced after I get up in the morning. The pain is very minor. Poking with the needle to remove seroma is painful when the surgeon does it and a day afterwards.