The fluid that accumulates after a tummy tuck is related to the lymphatic drainage system of the abdomen. To perform a tummy tuck, the upper abdominal skin is elevated off the abdominal muscle layer. The lymphatic vessels exist in this surgical plane and thus many are disrupted during the course of the operation. Leakage can occur simply due to the disruptions in these little vessels. On top of this, the surgical manipulation of the skin, fat, and muscle creates a large inflammatory response which dilates blood vessels, brings in much more fluid to the area and thus the entire area swells. If fluid collects in the space between the muscles and the fat, we call this a seroma. Initially, the drains placed during the operation remove this fluid, but after the drains are removed, this fluid can continue to accumulate and may need an aspiration. For swelling within the tissues, compression garments, lowering salt intake, and time can help. As the healing process continues and the inflammatory response subsides, the swelling eventually decreases. This process can take several months to complete.