Surgery

Gynecomastia Surgery Risks: What Can Go Wrong, and How Often

Gyno surgery is usually safe, and most problems are small and fixable. But "usually" isn't "always," and you deserve the numbers before you sign anything. Here's what can go wrong, how often, and what you can do about it.

By Updated 5 min read Based on 6 medical sources
Gynecomastia Surgery Risks: What Can Go Wrong, and How Often: MOST COMMON EARLY Blood collection; HOW OFTEN About 1 in 17 in a review; MOST COMMON LATER Some tissue left SURGERY What can go wrong in gyno surgery? GYNOTREATMENT.COM 1 MOST COMMON EARLY Blood collection 2 HOW OFTEN About 1 in 17 in a review 3 MOST COMMON LATER Some tissue left

Quick answer

The most common early problem is a hematoma, a collection of blood under the skin: about 5.8% in a 2020 review of 1,112 patients, and 7.8% of breasts in a study of teens. Fluid collections, minor infections, changes in nipple feeling, uneven contour and leftover tissue also happen. Serious complications are rare, and most problems are fixable.

On this page
  1. The numbers, from the best sources
  2. How often problems happen
  3. The early problems
  4. The later problems
  5. What makes problems more likely
  6. How to lower your risk
  7. Questions
  8. Sources

The numbers, from the best sources

I wanted real numbers before I'd even consider booking, not "complications are rare." Two studies give the clearest picture.

A 2020 review in Plastic and Reconstructive Surgery Global Open pooled 17 studies covering 1,112 patients. Major complication rates ranged from 0% to 33% between studies, which tells you how much surgeon, technique and patient matter. Across all of them, a hematoma was the most common complication at 5.8%, followed by a seroma, a pocket of clear fluid, at 2.4%.

A 2022 study from Boston Children's Hospital followed 145 young men aged 12 to 21. In the first weeks, 10% of operated breasts had a problem, mostly hematomas (7.8%) and minor infections (2.2%), with no serious complications. Over the following months, about a third had at least one later issue, most often tissue left behind (12.6%) or an uneven contour (9.2%).

How often problems happen

Rates of common problems after gynecomastia surgery (percent)
  1. Hematoma, review of 1,112 patients 5.8%
  2. Seroma, review of 1,112 patients 2.4%
  3. Hematoma, teens, per breast 7.8%
  4. Minor infection, teens, per breast 2.2%
  5. Tissue left behind, teens, per breast 12.6%
  6. Uneven contour, teens, per breast 9.2%

Sources: Holzmer et al., Plastic and Reconstructive Surgery Global Open, 2020; Labow and colleagues, Plastic and Reconstructive Surgery, 2022. Different studies count differently, so compare within a study, not across them.

The early problems

Hematoma. Bleeding that collects under the skin. It usually shows up in the first day or two as one side swelling, tightening and hurting much more than the other. Small ones settle on their own; bigger ones need draining, sometimes back in the operating room. This is the one to call your surgeon about immediately.

Seroma. Clear fluid that builds up under the skin, usually a little later. It feels like a soft, sloshing swelling. Surgeons drain it with a needle, sometimes more than once.

Infection. Redness, warmth, fever or a leaking wound. Usually treated with antibiotics.

Blood clots. Rare, as with any surgery under anesthesia. Breathlessness, chest pain or a racing, irregular heartbeat after surgery is an emergency, not a wait-and-see.

The later problems

Tissue left behind. The most common later issue in the teen study. It shows up as a bump or firmness under the nipple once swelling goes down. It's more likely when liposuction alone is used on firm gland. Fixing it means a second, smaller operation.

Uneven contour or asymmetry. One side flatter than the other, or a step where treated and untreated areas meet. Nuffield Health lists asymmetry, contour irregularities, and under- or over-correction among the specific risks.

Over-correction. Taking out too much tissue under the nipple can leave a sunken, saucer-shaped area. It's harder to fix than leftover tissue, which is why good surgeons leave a little behind.

Nipple changes. Changes in nipple sensation can be temporary or permanent, says Nuffield. Very rarely, the nipple's blood supply is damaged and some nipple tissue is lost.

Scars. ASPS is clear that all surgical scars are permanent; they fade but don't disappear. Thick, raised scars can be treated, and silicone scar care helps.

What makes problems more likely

The 2020 review found more blood and fluid collections in the group with more grade III patients, and in the teen study, removing skin went with two and a half times the rate of early problems. In short, bigger operations carry bigger risks.

This is the part I found reassuring: some of it is in your hands. ASPS member surgeon Manish Shah advises quitting smoking and stopping medicines that raise bleeding risk before surgery, as your surgeon directs. Following the recovery instructions, especially wearing the compression garment and avoiding strain early, matters too.

How to lower your risk

  1. Choose the surgeon carefully

    Board certification, real gyno experience, and a plan that fits your chest. See how to choose a gynecomastia surgeon.

  2. Tell them everything you take

    Prescriptions, supplements, anything bought online, and any steroid or hormone use. Some raise bleeding risk; some cause gyno to come back.

  3. Quit smoking

    Smoking slows healing. Ask your surgeon how far ahead to stop.

  4. Follow the aftercare to the letter

    Vest on as long as told, no heavy lifting early, and every follow-up appointment kept.

Questions people ask

What is the most common complication of gynecomastia surgery?

A hematoma, a collection of blood under the skin, at about 5.8% in a 2020 review of 1,112 patients. Most are caught early and treated.

Is numbness after gynecomastia surgery permanent?

Often it's temporary and improves over months as nerves recover. Nuffield Health notes that changes in nipple sensation can sometimes be permanent.

Can gyno come back after surgery?

Removed tissue doesn't grow back, but tissue left behind can show up as swelling settles, and new tissue can grow if the cause returns, such as steroids, certain medicines or major weight gain.

How common is revision surgery for gynecomastia?

In the Boston Children's study of young men, tissue left behind affected 12.6% of operated breasts, and some of those needed a second operation. ASPS says a second operation is sometimes needed to refine results.

Is gynecomastia surgery dangerous?

Serious complications are rare. In the teen study there were none, and most problems in the research are minor and treatable. Like any surgery, it carries risks from anesthesia and bleeding.

Sources

  1. Holzmer SW, Lewis PG, Landau MJ, Hill ME. Surgical management of gynecomastia: a comprehensive review of the literature. Plastic and Reconstructive Surgery Global Open, 2020
  2. Wolters Kluwer. Male breast reduction surgery improves quality of life for teens, even with complications (Plastic and Reconstructive Surgery, 2022)
  3. Nuffield Health. Gynaecomastia surgery (male breast reduction)
  4. American Society of Plastic Surgeons. Gynecomastia surgery recovery
  5. American Society of Plastic Surgeons. Gynecomastia surgery results
  6. Shah M. What men need to know before having gynecomastia surgery. American Society of Plastic Surgeons, 2019

Medical facts last checked against these sources on .

Medical disclaimer. I'm a guy who has lived with gyno, not a doctor. This page explains what published medical sources say, in plain words, so you can have a better conversation with your own doctor. It isn't medical advice, a diagnosis or a treatment plan. Don't start, stop or change any medication without talking to a doctor. If something on your chest is changing fast, hurts, or leaks fluid, get it checked.

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