We are born with all the fat cells that we will have. When we gain weight, the fat cells are increasing in size. When liposuction is done some (NOT ALL) of the fat cells are removed from the area where the liposuction is done. That means that there is less fat cells there. When you gain weight in the future the fat cells left in that area can still increase in size, but overall there are less fat cells in that area, so weight gain will not happen as quickly as it would have in the past (in that specific area). This can change the way that you gain weight. For example, if you normally gain weight first in the love handle region and can never really lose that fat with diet and exercise and you get liposuction there, then that will not be your "trouble" area in the future. Some patients love this BUT others get annoyed because an area of their body that they are not used to getting fat may show the weight gain more obviously in the future. The best way to go about it, is not to gain any weight after the surgery. Keep a healthy lifestyle with regular exercise and a healthy diet.