Liposuction — it changes shape, not weight

A thin cannula is passed under the skin to suction fat cells out of the subcutaneous layer. The number of fat cells in an adult stays roughly fixed, so the cells that are removed do not come back in that spot. That is why the operation gets called permanent.

That word is easy to misread. The fat cells left behind can still grow. If your weight goes up the treated area grows again, and areas that were treated less can stand out more.

And this is not an operation for losing weight. There is a limit to how much can safely be removed at once, and that amount does not move the scale much. What changes is contour, not mass.

It does not reach visceral fat. If a stomach protrudes because of what is inside the abdominal wall rather than under the skin, this operation will not change it.

The surface can heal uneven. Leaving the fat layer even is close to the whole skill of this operation, and lumps or dents are harder to correct afterwards than they were to avoid.

Compression garments are worn for a long time. Usually several weeks to about two months, and they bear directly on swelling and on how the skin lies down.

Treating many areas at once adds risk. The more volume removed, the larger the problems of fluid balance and bleeding.

If one calf swells or you become short of breath, report it immediately. Clots are uncommon but do occur after long operations spent lying still.

Skin elasticity is half the result. Remove fat and the skin has to take up the slack; how well it does depends on age and condition. Where elasticity is lacking, the treated area can end up looking loose.

Do it at a stable weight. If you are in the middle of losing weight, afterwards is better. Contour shaped against a moving baseline belongs to a body you will not have in a few months.

The final shape arrives at three to six months. Before that it is a mix of swelling and garment marks.

Not smoking matters especially here. Blood flow is directly involved in how the skin re-adheres.

This cannot be undone. Fat can be put back by grafting, but it does not return to the layer it came from.

Treating one area makes the others more visible. Bodies are not read in parts. Noticing the waist or back more after only the abdomen was treated is common.

It assumes you will manage weight afterwards. The operation does not stand in for that. If the remaining cells enlarge, the contour changes again.

Do not take the anaesthesia lightly. Among cosmetic operations this is one where general anaesthesia and removed volume rise together.