Gynecomastia is the medical term for enlarged breast tissue in males. It happens when glandular tissue in the chest grows beyond what is typical, usually because of a hormonal imbalance between estrogen and testosterone.
Gynecomastia is common. Depending on the study, somewhere between 40% and 65% of men will deal with it at some point in their lives, according to the Mayo Clinic. That number surprises most of my patients. Many walk into my office in Los Angeles thinking they are the only ones, but the reality is that this condition affects nearly half of all men across every age group.
How gynecomastia develops
All males have some breast tissue. During normal development, testosterone keeps that tissue from growing the way it does in females. When estrogen levels rise relative to testosterone, or when the body becomes more sensitive to estrogen, that tissue can expand. The result is a noticeable fullness, firmness, or outright swelling in one or both sides of the chest.
This can happen at three common life stages. Newborns sometimes have temporary breast swelling from their mother’s estrogen. Adolescent boys going through puberty experience hormonal fluctuations that trigger breast growth in roughly 50-70% of cases, though it usually resolves on its own within six months to two years. And men over 50 frequently develop gynecomastia as testosterone production naturally declines.
What causes gynecomastia?
The causes fall into a few categories. Understanding the underlying cause matters because it changes the treatment plan.
Hormonal shifts. This is the most common driver. Any condition that lowers testosterone or raises estrogen can trigger breast tissue growth. Hypogonadism, hyperthyroidism, and certain tumors that produce hormones all fall into this group.
Medications. A long list of drugs can cause gynecomastia as a side effect. Anti-androgens used for prostate conditions, anabolic steroids, some anti-anxiety medications, certain antibiotics, heart medications like digoxin and calcium channel blockers, and drugs used to treat ulcers or acid reflux have all been linked to breast tissue growth. Dr. Moeinolmolki sees patients on finasteride for hair loss who develop breast tissue as an unexpected consequence of the drug.
Anabolic steroids and testosterone supplements. This is one I see frequently in my practice. Men who use anabolic steroids or take testosterone without medical supervision often develop gynecomastia. The body converts excess testosterone to estrogen through a process called aromatization, and the result is exactly the opposite of what these men intended.
Obesity. Excess body fat increases estrogen production because fat tissue contains the enzyme aromatase. But obesity also creates a separate issue: fat deposits in the chest that look like gynecomastia but are actually pseudogynecomastia. More on that distinction below.
Chronic health conditions. Liver disease, kidney failure, and malnutrition can all disrupt hormone metabolism enough to cause breast tissue growth.
Substance use. Marijuana, alcohol (especially heavy or chronic use), heroin, and methadone have all been associated with gynecomastia.
For a more detailed breakdown of causes, I have written a separate guide on gynecomastia causes, symptoms, and treatment.
True gynecomastia vs. pseudogynecomastia
This is one of the first things I evaluate when a patient comes in. True gynecomastia involves actual glandular breast tissue. It feels firm or rubbery, sits directly behind or around the nipple, and does not go away with weight loss. Pseudogynecomastia, on the other hand, is chest enlargement caused by fat deposits alone. It feels softer, distributes more evenly across the chest, and can often improve with diet and exercise.
Many men have a combination of both. I see patients regularly who have glandular tissue plus excess fat, which requires a combined approach to treatment. The distinction matters because a man with pure pseudogynecomastia may not need surgery at all if he can lose enough body fat. A man with true glandular tissue will not see that tissue shrink from working out, no matter how hard he trains.
I cover this topic in detail on my page about gynecomastia vs. chest fat.
How is gynecomastia graded?
Surgeons typically classify gynecomastia using a grading system that runs from Grade 1 through Grade 4. This helps us communicate the severity and plan the right surgical approach.
Grade 1 is minor enlargement without excess skin. The nipple area may look slightly puffy, but the change is subtle enough that many men only notice it themselves.
Grade 2 is moderate enlargement without excess skin. The breast mound is clearly visible, often creating a noticeable contour under a shirt. This is the most common grade Dr. Moeinolmolki treats surgically.
Grade 3 is moderate enlargement with some excess skin. The tissue has started to stretch the skin enough that removing the gland alone will not produce a flat result.
Grade 4 is significant enlargement with substantial excess skin. The chest resembles a female breast, and skin removal is almost always necessary alongside gland excision.
I go into each grade with photos and surgical considerations on my gynecomastia grades page.
How do doctors diagnose gynecomastia?
Diagnosis starts with a physical exam. I palpate the chest to feel for the characteristic disc of firm tissue behind the nipple. This is sometimes called the “pinch test,” where you gently pinch the tissue between your thumb and forefinger. Glandular tissue feels distinctly different from fat. It has a rubbery, firm texture and is usually concentrated around the areola.
Dr. Moeinolmolki also takes a thorough medical history during the consultation. I ask about medications, supplement use, steroid history, alcohol intake, family history, and any symptoms like pain or nipple discharge. These details help me identify the underlying cause.
In some cases, I order blood work to check hormone levels, including testosterone, estrogen, thyroid hormones, and liver function markers. If the physical exam raises any concern about breast cancer (which is rare in men but does occur), I may order a mammogram or ultrasound.
You can try a version of the pinch test at home. I describe how on my gynecomastia pinch test page. But a home assessment is not a substitute for a clinical evaluation.
What are the treatment options?
Treatment depends on the cause, the severity, and how long the condition has been present.
Watchful waiting. For adolescent boys going through puberty, the first recommendation is usually patience. Most pubertal gynecomastia resolves on its own within one to two years as hormone levels stabilize. If a teenager still has persistent breast tissue after age 18, it is unlikely to go away without intervention.
Addressing the underlying cause. If a medication is causing the problem, switching to an alternative drug may allow the breast tissue to regress. If obesity is a contributing factor, weight loss can reduce the fat component, though established glandular tissue will remain. If a hormonal condition is identified, treating that condition may help.
Medications. Tamoxifen and raloxifene are selective estrogen receptor modulators (SERMs) that have shown some effectiveness in reducing breast tissue, particularly in the early stages. Tamoxifen has been studied more extensively for gynecomastia and can reduce breast size in about 80% of patients when used within the first few months of onset. However, once the tissue has been present for over a year and has become fibrotic, medications are much less effective. These drugs also carry their own side effects, and they are used off-label for this purpose.
Surgery. For gynecomastia that has been present for more than 12 months, has progressed beyond mild severity, or has not responded to other treatments, surgery is the most reliable solution. I walk through the options on my how to get rid of gyno page. The specific technique depends on the grade and the ratio of glandular tissue to fat.
How I approach gynecomastia surgery
I am Dr. Babak Moeinolmolki, MD, FACS, dual board-certified by the American Board of Cosmetic Surgery (ABCS) and the American Board of General Surgery. I have treated hundreds of men with gynecomastia at my practice in Los Angeles.
My approach is tailored to each patient. For men with primarily glandular tissue and minimal fat, I perform direct excision through a small incision at the edge of the areola. For men with a combination of gland and fat, I typically combine excision with liposuction to sculpt the entire chest. For higher-grade cases with excess skin, I incorporate skin tightening or skin removal techniques.
The procedure is usually performed under general anesthesia or IV sedation and takes between one and two hours. Most of my patients return to desk work within three to five days. Strenuous exercise is restricted for about four weeks. Compression garments are worn for several weeks to help the skin conform to the new chest contour.
Results are permanent as long as the underlying cause is addressed. If a man continues using anabolic steroids or gains a significant amount of weight, there is some risk of recurrence. But in most cases, the glandular tissue that is removed does not grow back.
For a complete walkthrough of what surgery involves, including preparation, recovery, and expected results, see my gynecomastia surgery guide.
Frequently asked questions
Is gynecomastia dangerous?
Gynecomastia itself is not dangerous. It is a benign condition in the vast majority of cases. However, it can cause significant psychological distress, including anxiety about appearance, avoidance of activities that require removing a shirt, and reduced self-confidence. In rare instances, breast enlargement in a male can be a sign of an underlying condition like a hormone-producing tumor, which is why a proper medical evaluation is important.
Can gynecomastia go away on its own?
It depends on the cause and timing. Pubertal gynecomastia resolves on its own in about 75-90% of cases within one to two years. Gynecomastia caused by a medication may improve when the medication is stopped. But gynecomastia that has been present for more than 12 to 18 months and has progressed to fibrotic tissue is very unlikely to resolve without surgery.
Does exercise get rid of gynecomastia?
Exercise can reduce the fat component if excess fat is contributing to chest fullness. Chest exercises like bench press can build the pectoral muscles underneath. But exercise cannot shrink glandular breast tissue. If you have true gynecomastia with firm tissue behind the nipple, no amount of push-ups or chest flys will make that tissue disappear.
What is the difference between gyno and regular chest fat?
Gynecomastia (“gyno”) involves actual breast gland tissue. It feels firm and sits behind or around the nipple. Regular chest fat (pseudogynecomastia) is softer, spreads more evenly across the chest, and can shrink with weight loss. Many men have both. A physical exam is the most reliable way to tell the difference.
How much does gynecomastia surgery cost?
The cost varies based on the severity of the condition, the surgical technique required, anesthesia fees, and the facility. In Los Angeles, gynecomastia surgery typically ranges from $5,000 to $10,000. Insurance may cover part of the cost if the condition is documented as medically necessary, though many plans consider it cosmetic. During a consultation, I provide a detailed cost breakdown specific to each patient’s situation.
At what age should you consider surgery for gynecomastia?
For teenagers, I generally recommend waiting until at least age 18, unless the condition is severe and causing significant emotional distress. By 18, puberty-related hormonal fluctuations have usually stabilized, and we can be more confident that the tissue will not resolve on its own. For adults, there is no upper age limit. I have successfully treated men in their 20s through their 70s.