Sorry to hear about your problem. Most surgeons in North America use drainage tubes after a tummy tuck to remove fluid that tends to accumulate under the tummy skin flap. A good way of avoiding drains, and avoiding the hassle of "seromas" (the fluid even has its own name!) is to see a surgeon who is trained to close the wound on the inside. Yes, it takes time to do this, and it may cost you a bit more, but you won't have to put up with the swelling, discomfort, and hassle of drainage tubes. As an added bonus, graduated tension sutures (as they are called) also take all the strain off the wound closure, so you typically end up with better incision scars. The medical term for this procedure is 'closing the dead space', and it involves quilting sutures that stitch the 'flap' (the skin and fat that the surgeon lifts off the muscle layer) back down. Thus, there is no place where fluid can collect. Healing is usually faster, since there is no movement between the layers that we want to heal together. Many surgeons hate this added step, since it slows them down a bit in the OR and thus increases costs in the facility. I have been using this technique for over 11 years, since it was taught to my by my colleague Ricardo Baroudi from Brazil. I have not had any seromas at all in hundreds of abdominoplasties since using this technique, and I encourage my colleagues to adapt it. For me, it is a no brainer-- the outcomes are much better for my patients.
FYI- If a seroma has been present for a long time, they sometimes will gain a tissue lining, which makes them resistant to treatment with repeated drainage alone. Sometimes, it will be necessary to actually 'go back in' to strip this lining away so that the layers can stick together. Some surgeons have used chemicals or drugs to stimulate the fluid pocket to scar together if repeated drainage does not work. This usually involves temporarily putting some indwelling drains back in to place for a period of time.