Liposuction is a surgical procedure used to remove localized excess fat, and it is described in the medical literature as one of the most common procedures used for body contouring[1][2]. In a study of fifty-one patients who had VASER-assisted liposuction, body weight one month later had fallen by an average of 4.73 kg in women and 3.39 kg in men[2]. A review of weight loss and liposuction describes fat preferentially building up again in certain areas after liposuction, and links avoiding that to a negative energy balance[3].
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Last updated: October 26, 2026
Liposuction changes body shape, and it is one of the most common procedures used for body contouring[2]. The procedure is used to remove localized excess adipose tissue (body fat)[1].
High-definition liposuction is described as an advanced body contouring technique that offers an athletic and healthy body appearance[4]. In one series of high-definition liposuction, the five hundred and sixty-eight patients had a mean BMI (body mass index) of 25.6, with a range of 21 to 29 kg/m2[4].
When the abdomen is assessed for contouring surgery, surgeons sort patients according to the treatable layers of skin, fat and muscle[5]. Postpartum changes to the abdominal wall are typically most thoroughly addressed by abdominoplasty, also called a tummy tuck[5].
A study that weighed patients after liposuction found a significant decrease in body weight and BMI one month after surgery[2]. In the VASER-assisted study, thirty women and twenty-one men were weighed before surgery and one month afterwards[2]. Women lost an average of 4.73 ± 4.73 kg and men an average of 3.39 ± 4.27 kg, and BMI fell in both groups[2].
The amount of weight lost in that VASER study did not correlate with gender, age, aspirate volume or the volume of fat removed[2].
A larger multicenter cohort from South Korea included 3,832 patients who had local anesthetic minimally invasive liposuction, and 3,825 of them were female[6]. In that cohort, the volume of aspirated fat was associated with reductions in body weight across all edema (swelling) groups[6]. The strength of that association declined as postoperative swelling became more severe[6].
Swelling after liposuction can obscure surgical outcomes, according to the authors of the South Korean cohort[6]. In the South Korean cohort, the authors suggested that postoperative fluid retention may obscure the weight-reducing effect of the fat that was removed[6]. Most patients in that cohort reported mild swelling (90.34%), while 5.61% reported moderate to severe swelling and 4.04% reported none[6].
Weight after body contouring can change over time, and one long-term study found that weight regain is common after trunk-based body contouring operations[7]. A review of weight loss and liposuction notes that the body mounts a complex compensatory response to any intervention that depletes its energy stores[3].
The same review describes the preferential reaccumulation of fat in certain areas after liposuction, and the ability to avoid this with a negative energy balance[3]. The authors concluded that optimizing weight status may in turn optimize the aesthetic outcomes of liposuction[3].
One study of longer-term weight looked at trunk-based body contouring, which in that study meant abdominoplasty, panniculectomy and circumferential lipectomy[7]. That retrospective study followed 121 patients for an average of 42.9 months after surgery[7]. Patients who had previously had bariatric surgery gained an average of 4.39% of their baseline weight, while patients without bariatric surgery gained 0.25%[7].
In the same trunk-based contouring study, weight regain after the lowest weight occurred in both groups, at 11.81% in the post-bariatric group and 7.56% in the non-bariatric group[7]. The authors concluded that long-term weight regain is common after trunk-based body contouring, especially in post-bariatric patients[7].
BMI appears to matter for complications, according to a single-center study of VASER liposuction[8]. That study reviewed 117 patients, of whom 48 had a BMI below 24.9 kg/m2 and 69 had a BMI above 25.0 kg/m2[8]. In patients with a BMI above 25 kg/m2, the most common complications were contusion, hematomas and abnormal skin retraction, whereas no complications were observed in the normal-weight patients[8].
Across liposuction in general, a systematic review and meta-analysis of 39 studies including 29,368 patients reported an overall complication rate of 2.62 (95% CI, 1.78-3.84)[1]. Contour deformity was the most common complication, with a prevalence of 2.35%[1]. The patients in that meta-analysis had a mean BMI of 26.36 kg/m2[1].
Minor complications of liposuction such as bruising, seromas, infections and contour irregularities do not threaten the patient's life but can generate significant dissatisfaction[9].
A review of weight loss and liposuction concluded that a variety of strategies for weight loss exist[3]. That review also discusses weight regain and the difficulties in maintaining weight loss[3].
A single case report described a man with a BMI of 40.9 kg/m2 who had VASER liposuction followed by a ketogenic diet for six months[10]. Over that follow-up, his weight fell from 127 kg to 97 kg[10]. The authors credited the combined approach of VASER liposuction and a ketogenic diet for that result[10].
Surgeons who studied VASER liposuction advised selecting patients based on their BMI, the anatomy of the treated area and the volume of fat to be removed[8]. They described that selection as a way to ensure patients are suitable for the procedure and that results align with their aesthetic expectations[8].
For people who have already lost a large amount of weight, body contouring after massive weight loss involves removing excess skin as well as fat[11]. These patients can have altered metabolism, nutrition and psychological makeup, which surgeons take into account when preparing them for surgery[11]. Many problems need to be addressed in massive weight loss patients before surgery, including nutritional and psychological complications[12].
Abdominoplasty procedures are often unsatisfactory in correcting body deformities after massive weight loss, and the flanks, hip rolls and buttocks also need to be addressed surgically[13].
For lipedema, liposuction is considered as a treatment for severe cases where conservative methods fail[14]. Lipedema is a chronic disease characterized by the symmetrical accumulation of fat in the lower body, primarily affecting women[14]. In lipedema, diet, weight loss and complex decongestive therapy offer symptom management but are not curative[14].
In a review of 126 women treated for lipedema with selective combined liposuction, 89% reported reduced pain, 92% reduced heaviness and 82% reduced swelling at six months[15]. In a separate case series of 24 women with lipedema, BMI fell from 29.65 kg/m2 before surgery to 26.95 kg/m2 afterwards[16].
A consultation with a board-certified surgeon is the place to talk through your goals for shape and for weight. Questions you may want to ask include:
If you notice chest pain, shortness of breath, a rapidly growing swelling or a fever after surgery, contact your surgeon or emergency services right away.
In a study of fifty-one patients who had VASER-assisted liposuction, average body weight one month later had fallen by 4.73 kg in women and 3.39 kg in men[2]. In that study, the drop in weight did not correlate with the volume of fat removed[2].
Liposuction is described as a body contouring procedure used to remove localized excess fat[1][2]. A review of weight loss and liposuction concluded that optimizing weight status may in turn optimize the aesthetic outcomes of liposuction[3].
In a cohort of 3,832 patients who had local anesthetic minimally invasive liposuction, the authors suggested that postoperative fluid retention may obscure the weight-reducing effect of the removed fat[6].
In a single-center study of 117 VASER liposuction patients, contusion, hematomas and abnormal skin retraction were the most common complications in patients with a BMI above 25 kg/m2, while no complications were observed in normal-weight patients[8].
A review describes the preferential reaccumulation of fat in certain areas after liposuction and the ability to avoid this with a negative energy balance[3].