Liposuction complications: from contour irregularities to embolism

Why it is worth knowing about complications

Liposuction is surgery that removes localized buildups of fat tissue, and in a recent annual report from an aesthetic plastic surgery society, it was named the most frequently performed cosmetic procedure ^[1]. Yet even though it is such a common operation, it has been pointed out that consolidated data on the risks of liposuction were lacking ^[1].

Liposuction has advanced considerably since it first appeared in the early 1980s, and it is summarized that understanding the anatomy, evaluation before surgery, technique during surgery, and care after surgery are all important for improving safety and results ^[3]. Common complications mainly involve shape and skin, and in rare cases there are serious complications that affect the whole body ^[1].

Common complications: contour deformities and skin changes

A 2024 systematic review and meta-analysis analyzed 29,368 patients included in 39 studies (average age 40.62 years, average body mass index 26.36) ^[1]. The most common complication was contour deformity, in which the skin surface looks lumpy or dented, at a rate of 2.35% ^[1].

This was followed by skin darkening (hyperpigmentation) at 1.49%, seroma (a buildup of fluid) at 0.65%, hematoma (a collection of blood) at 0.27%, and superficial burns at 0.25% ^[1]. Allergic reactions were reported at 0.16% and skin necrosis at 0.046% ^[1].

The authors assessed liposuction as surgery with few complications, but they concluded that explaining each risk specifically can improve surgical outcomes and deepen understanding between patients and surgeons ^[1]. The fact that contour deformity is the most common complication also means that it is important to align your expectations about your shape after surgery with your surgeon in advance.

Rare but serious complications

In the same meta-analysis, swelling throughout the body (generalized edema) occurred in 0.041%, infection in 0.020%, venous thromboembolism in 0.017%, and local anesthetic toxicity in 0.016% ^[1]. It is important to know that while these rates are low, they are not zero.

Fat embolism syndrome is defined as a condition in which fat enters the bloodstream, causing symptoms such as low blood oxygen (hypoxemia), respiratory failure, neurological abnormalities, and tiny pinpoint spots of bleeding on the skin (petechiae) ^[2]. Fat embolism syndrome after liposuction has a low incidence, but it is a life-threatening complication ^[2].

There is currently no specific treatment for fat embolism syndrome, so prevention, early detection, and supportive care are important, and it is pointed out that it often goes undiagnosed or is mistaken for another condition ^[2]. If you have unusual symptoms after surgery, such as shortness of breath or feeling confused or drowsy, tell your medical team right away.

A report analyzing European survey data from the 5 years from 1998 to 2002 identified 72 serious complications of liposuction, 23 of which were deaths ^[4]. The most common complications were bacterial infections such as necrotizing fasciitis, gas gangrene, and sepsis, and bleeding, perforation of abdominal organs, and pulmonary embolism were also named as causes of death ^[4].

Type of anesthesia and safety

Tumescent local anesthesia is a method of numbing the area by infusing a solution of local anesthetic mixed with a drug that narrows blood vessels (a vasoconstrictor) into the fat layer ^[4]. One literature review summarized that this method can remove a large amount of fat with little bleeding and few problems after surgery (postoperative morbidity) ^[4].

According to this review, data pooling more than 100,000 body areas treated with liposuction under tumescent anesthesia showed no serious complications such as death, embolism, hypovolemic shock (shock caused by loss of blood or fluid), perforation of the chest or abdominal cavity, thrombophlebitis, seizures, or drug toxicity ^[4]. In contrast, the plastic surgery literature has linked liposuction under general anesthesia with deep vein thrombosis or pulmonary embolism, perforation of organs such as those in the abdomen, infection, and bleeding ^[4].

However, this review gathers and compares findings from different sources; it is not the result of randomly dividing patients with the same conditions into groups and comparing them. In the 2024 meta-analysis, local anesthetic toxicity was also reported, though rarely, at 0.016% ^[1]. The type of anesthesia is decided based on the extent of liposuction and your health, so you should discuss it with your surgeon.

Liposuction to treat a medical condition

Lipedema is a chronic condition of the fat under the skin of the arms and legs that develops in women around or after puberty, and it is characterized by swelling of both legs or both arms, easy bruising, and pain ^[5]. Besides its cosmetic uses, liposuction is also used to treat this condition. Observational studies reported that liposuction substantially relieved the symptoms of lipedema and that complications were rare ^[6]. However, the quality of the evidence for this treatment is still low, and it is summarized that more methodologically rigorous studies are needed ^[6].

What to check to reduce complications

Preventing and managing the complications of liposuction is treated as a task that spans evaluation before surgery, technique during surgery, and care after surgery ^[3]. Even with the same surgery, the risk differs from person to person depending on the areas treated, the amount of fat removed, body type, and health. Consider checking the following during your consultation.

• The medications you take, any medical conditions you have, and any history of blood clots
• The areas to be treated and the amount of fat to be removed, and whether several areas will be treated at once
• The type of anesthesia and how you will be monitored during surgery
• How a contour deformity would be corrected if it occurs
• How to get in touch if you have emergency symptoms such as shortness of breath, a high fever, or severe pain