Gynecomastia explained: how common it is, gland vs fat, causes including medicines, warning signs, tests, and treatment from watchful waiting to surgery, with ASPS costs.
Fact-checked against FDA labels and official sources; not yet reviewed by a licensed clinician. This page is education, not medical advice. Talk to your doctor before starting, stopping or changing any treatment.
Key facts
- Who to ask
- Endocrinology, Plastic surgery, Primary care
- Also called
- male breast enlargement, man boobs, moobs, gyno, pseudogynecomastia, male breast reduction, gynecomastia surgery
Key takeaways
- About half of adolescent boys and about 65% of men aged 50 to 80 have some degree of gynecomastia; most cases cause no symptoms.[1]
- Medicines and substances cause 10% to 25% of cases; examples include spironolactone, anabolic steroids, finasteride, some HIV and heart medicines, alcohol and marijuana.[1]
- Chest fat (pseudogynecomastia) responds to weight loss; true gland tissue does not.[2]
- Puberty-related gynecomastia usually resolves within six months to two years.[2]
- ASPS lists an average surgeon fee of $5,587 for gynecomastia surgery, not including anesthesia or facility costs; most insurance does not cover it.[4]
In short: Gynecomastia is enlargement of the breast gland tissue in males. It is very common at certain ages, about half of adolescent boys and around 65% of men aged 50 to 80 have some degree of it, and it is usually harmless. It is different from extra chest fat (pseudogynecomastia), which weight loss can reduce; true gland tissue does not shrink with diet or exercise. Causes include normal hormone shifts, some medicines and substances, and medical conditions, so the first step is an evaluation by a clinician. Treatment ranges from waiting it out, to changing a medicine, to medication or surgery.
This page is general education to help you understand your options and prepare for a medical visit. It cannot tell you what is causing your symptoms. Please see a licensed clinician for an exam before trying any treatment, and choose a board-certified surgeon if surgery comes up.
| Item | Value |
|---|---|
| Newborns (palpable breast tissue, up to) | 90% |
| Adolescent boys (about) | 50% |
| Men aged 50 to 80 (about) | 65% |
In newborns it comes from the mother's estrogen and usually resolves within weeks. Most cases at every age cause no symptoms.
Source: Dickson G, American Family Physician 2012 (checked on October 6, 2026)
What gynecomastia is
The European Academy of Andrology’s 2019 guideline defines gynecomastia as a benign growth of the glandular tissue of the breast in men. MedlinePlus explains that the main trigger is an imbalance between estrogen, which stimulates breast tissue, and testosterone, which normally keeps it in check. It can affect one side or both. Because a lump on only one side can have other causes, any new lump deserves an exam.
Gland or fat? The difference that matters most
Many men with a fuller chest do not have gynecomastia at all. MedlinePlus distinguishes gynecomastia from lipomastia, also called pseudogynecomastia, which is extra fat in the chest rather than gland tissue. The difference changes everything about what helps:
- Fat (pseudogynecomastia) is excess fat in the chest, and it can shrink as overall body fat goes down. Our how to lose weight hub and strength training guide are the right starting point.
- Gland tissue (true gynecomastia) is breast tissue rather than fat, so it does not respond to diet or chest exercises. MedlinePlus lists obesity among the conditions that can cause it, so some men have both fat and gland.
A clinician can usually tell the difference with an exam, and sometimes an ultrasound or mammogram. The NIH lists “spot reduction” promises among the red flags of weight-loss programs: targeted chest exercises build muscle but do not burn fat from one area; whole-body fat loss does.
Causes, including medicines
A review in American Family Physician lists the causes of gynecomastia by how often they are found. About a quarter of cases are physiologic (normal hormone shifts, such as puberty), about a quarter have no identifiable cause, and medicines or substances account for 10% to 25%.
Medicines and substances linked to it
MedlinePlus and American Family Physician list medicines and substances that can cause breast tissue growth. Examples include:
- prostate medicines such as finasteride and dutasteride, and anti-androgens such as flutamide;
- spironolactone (a diuretic and blood pressure medicine), digoxin and some other heart medicines;
- anabolic steroids, estrogens and gonadotropin-releasing hormone agonists;
- cimetidine (a stomach acid medicine) and ketoconazole (an antifungal);
- medicines that raise prolactin, such as haloperidol, phenothiazines and metoclopramide;
- some HIV medicines, some antidepressants, and cancer chemotherapy;
- alcohol, marijuana, heroin, amphetamines and methadone.
American Family Physician notes that when spironolactone is the cause, stopping it often leads to regression within about three months. Never stop a prescribed medicine on your own, though: ask the prescriber whether there is an alternative. If you use anabolic steroids or “testosterone boosters” bought online, tell your clinician honestly; it changes the workup and the advice.
Medical conditions
MedlinePlus lists liver disease, kidney failure, low testosterone, obesity, thyroid disorders and pituitary tumors. Rarely, a tumor of the testes or adrenal glands makes hormones that cause breast growth, which is why a clinician may examine the testicles and the EAA guideline includes testicular ultrasound in the evaluation. Our conditions hub covers other weight-related conditions, and find a provider explains which specialists handle hormone problems.
Does it go away on its own?
Often, yes, when it is part of normal development. MedlinePlus says about half of newborn boys have breast buds that usually go away in two to six months, and that more than half of boys have some breast enlargement during puberty, which usually resolves within six months to two years. American Family Physician describes physiologic gynecomastia as typically resolving within six months to two years after it starts. In adults, it may improve when the underlying cause, such as a medicine, is addressed. American Family Physician notes that medicines work best when used early, and that surgical complications increase when the condition has lasted longer or is more severe.
A typical path, from first visit to treatment
- Exam and historyMedicines, supplements, alcohol and drug use, symptoms, and a chest and testicular exam.
- Tests if neededBlood tests for hormones, liver, kidney and thyroid; imaging if a lump is unclear.
- Treat the causeChange a medicine with the prescriber, or treat a hormone or organ condition.
- Watch and waitMany cases, especially in teens, settle within months to two years.
- Medicine or surgeryFor persistent or bothersome cases, discussed with a specialist.
Tests a clinician may order
Not everyone needs tests. When they are needed, American Family Physician lists liver and kidney function tests and hormone levels such as thyroid-stimulating hormone (TSH), human chorionic gonadotropin (hCG), luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol, testosterone and prolactin. The EAA guideline recommends a careful history and physical exam with testicular ultrasound, considering laboratory testing, and breast imaging when the findings are unclear.
When to see a doctor, and the warning signs
Male breast cancer is uncommon, but it exists, and some signs need prompt attention. MedlinePlus advises contacting a provider for recent swelling or enlargement, dark or bloody nipple discharge, skin sores over the breast, or a hard or firm lump. American Family Physician adds signs that call for imaging: a lump on one side only, skin changes, a firm or fixed lump, rapid growth, and swollen lymph nodes in the armpit.
Treatment options
Watchful waiting and treating the cause
The EAA guideline recommends watchful waiting after any underlying cause has been addressed, and reserving testosterone treatment for men with confirmed testosterone deficiency. Testosterone is not a general treatment for gynecomastia.
Medicines
MedlinePlus mentions hormone treatment that blocks the effects of estrogen. American Family Physician describes tamoxifen and raloxifene (selective estrogen receptor modulators) as options that work best when used early, and tamoxifen as a preventive option for men taking the prostate cancer medicine bicalutamide. These uses are generally off-label for gynecomastia and come with their own risks, so they are a specialist decision.
Surgery (male breast reduction)
The EAA guideline suggests surgery only for persistent cases that do not respond to medical management. The American Society of Plastic Surgeons (ASPS) describes two main techniques, often combined: liposuction for the fatty part, and excision through a small half-moon incision around the edge of the areola to remove firm gland tissue. When there is a lot of loose skin, for example after major weight loss, skin may also need to be removed, which leaves longer scars. See our liposuction guide and the loose skin hub for related procedures.
ASPS describes good candidates as men whose condition cannot be corrected with other medical treatment, who are in good health, nonsmokers and non-drug users, of relatively normal and stable weight, whose breast development has stabilized, and who have realistic expectations. Teenagers can have surgery, but ASPS notes that further procedures may be needed if breast development continues.
Recovery after gynecomastia surgery, as ASPS describes it
- First daysDressings and a compression garment; sometimes a small drain. Showering is often allowed about two days after.
- Back to workA few days for simpler procedures; two to three weeks for more extensive ones.
- CompressionWorn for at least six weeks, often longer, to control swelling.
- Upper-body exerciseFrom a couple of weeks to a couple of months, as your surgeon advises.
- Long termResults are usually permanent if weight stays stable and triggers such as steroids are avoided.
ASPS lists these risks: anesthesia risks, bleeding (hematoma), blood clots and deep vein thrombosis, heart and lung complications, uneven results (asymmetry, contour irregularities), changes in nipple or breast sensation that may be permanent, damage to deeper structures, fat necrosis, fluid collection (seroma), infection, persistent pain, poor wound healing, unfavorable scarring, reactions to tape or sutures, and the possibility of revision surgery. ASPS advises seeking immediate care for shortness of breath, chest pain or an irregular heartbeat after surgery.
Cost and insurance
Gynecomastia surgery in numbers
- $5,587average surgeon's fee for gynecomastia surgery, ASPS (excludes anesthesia, facility and other costs)American Society of Plastic Surgeons
- 11%more gynecomastia surgeries in 2024 than in 2023, the fastest-growing procedure among male patientsAmerican Society of Plastic Surgeons
- 6+ weeksminimum time in a compression garment after surgeryAmerican Society of Plastic Surgeons
Checked on October 6, 2026
The surgeon’s fee is only part of the total. ASPS lists anesthesia fees, facility costs, medical tests, compression garments and prescriptions as additional expenses, and says most health insurance plans do not cover male breast reduction or its complications, although policies vary and some cases may be treated as reconstructive. Ask for a written, all-inclusive quote. Be careful with medical credit cards that charge deferred interest; our cost hub explains how they work.
Choosing a surgeon
Look for a surgeon certified by the American Board of Plastic Surgery who performs this operation regularly, operates in an accredited facility, shows you results for patients with a similar starting point, and explains what to expect if part of your chest is fat rather than gland. Our guide to finding a board-certified plastic surgeon explains how to verify credentials. If weight loss is still in progress, many surgeons prefer to wait until weight is stable; the body contouring hub explains why contouring is not a weight-loss method.
Body image and support
Gynecomastia can be emotionally hard, especially for teenagers. It is common, it is not your fault, and it is treatable. If it is affecting your mood, sport or relationships, say so to your clinician. Our guide to body image and confidence has practical ideas.
Overview
Gynecomastia is a benign growth of breast gland tissue in males, usually from an imbalance between estrogen and testosterone. It is common in newborns, in about half of adolescent boys and in about 65% of men aged 50 to 80. Causes include normal hormone changes, medicines and substances (10% to 25% of cases), and conditions such as liver disease, low testosterone, thyroid disease and, rarely, tumors. It differs from chest fat (pseudogynecomastia), which weight loss can reduce.
Signs
- Enlarged breast tissue on one or both sides
- Chest fullness that may be fat (pseudogynecomastia) rather than gland
- Warning signs: hard or fixed lump, one-sided lump, bloody or dark nipple discharge, skin sores or changes, rapid growth, swollen armpit glands
Tests a clinician may order
- History (medicines, supplements, alcohol, drugs) and chest and testicular exam
- Liver and kidney function tests
- Hormones: TSH, hCG, LH, FSH, estradiol, testosterone, prolactin
- Testicular ultrasound; breast ultrasound or mammogram when findings are unclear
What lifestyle research shows
Weight loss reduces chest fat (pseudogynecomastia) but does not shrink true gland tissue. Avoiding triggers such as anabolic steroids, alcohol and marijuana, and reviewing medicines with the prescriber, can help; when spironolactone is the cause, stopping it often leads to regression within about 3 months (AFP).
When to see a doctor
See a clinician for new breast swelling or enlargement, or tenderness. Get a prompt exam for a hard, fixed or one-sided lump, bloody or dark nipple discharge, skin sores or changes, rapid growth, or swollen glands in the armpit.
Treatments discussed
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Questions to ask your doctor or pharmacist
- Is this gland tissue, fat, or both, and how can you tell?
- Could any medicine, supplement or substance I use be causing it, and is there an alternative?
- Do I need blood tests or imaging, and which ones?
- How long should we wait before considering treatment?
- If surgery is an option, what technique would you use, what are the risks for me, and what is the all-inclusive cost?
- Are you certified by the American Board of Plastic Surgery, and how often do you perform this procedure?
Frequently asked questions
Will losing weight get rid of gynecomastia?
It depends on what the tissue is. Extra chest fat (pseudogynecomastia) usually shrinks as overall body fat goes down. True gland tissue does not respond to diet or exercise, although losing fat can make it less noticeable. A clinician can tell which you have.
Can chest exercises fix gynecomastia?
No. Exercises build the chest muscle underneath but do not remove gland tissue, and you cannot spot-reduce fat from one area. Whole-body fat loss and strength training help with the fat part.
Does gynecomastia go away by itself?
Often, when it is part of normal development. MedlinePlus says breast enlargement in puberty usually resolves within six months to two years. In adults it may improve when the cause, such as a medicine, is addressed.
Which medicines cause gynecomastia?
Examples include spironolactone, finasteride and dutasteride, anti-androgens, anabolic steroids, digoxin, cimetidine, ketoconazole, some HIV medicines, some antidepressants, medicines that raise prolactin such as metoclopramide, and chemotherapy. Do not stop a prescribed medicine without talking to the prescriber.
Is gynecomastia a sign of cancer?
Usually not; it is a benign condition. But get a prompt exam for a hard, fixed or one-sided lump, bloody or dark nipple discharge, skin changes, rapid growth or swollen armpit glands.
How much does gynecomastia surgery cost?
ASPS lists an average surgeon fee of $5,587 (checked on October 6, 2026). Anesthesia, facility fees, tests, garments and prescriptions are extra, and most insurance plans do not cover it.
What is recovery like after surgery?
ASPS describes a compression garment for at least six weeks, return to work in a few days for simpler cases or two to three weeks for extensive ones, and upper-body exercise after a couple of weeks to a couple of months, as the surgeon advises.
Are there medicines that shrink gynecomastia?
Estrogen-blocking medicines such as tamoxifen or raloxifene are sometimes used off-label and tend to work best early. They have their own risks, so they are a specialist decision. Testosterone is only for men with confirmed low testosterone.
Can teenagers have gynecomastia surgery?
Sometimes. Because most puberty-related cases settle within two years, waiting is common. ASPS notes that teens who have surgery may need further procedures if breast development continues.
References
- Dickson G. Gynecomastia. American Family Physician, 2012. (accessed October 6, 2026) Review
- Breast enlargement in males. MedlinePlus (National Library of Medicine), 2024. (accessed October 6, 2026) Government page
- Kanakis GA, Nordkap L, Bang AK, et al.. EAA clinical practice guidelines: gynecomastia evaluation and management. Andrology, 2019. doi:10.1111/andr.12636 · PMID 31099174 (accessed October 6, 2026) Guideline
- Gynecomastia surgery cost. American Society of Plastic Surgeons. (accessed October 6, 2026) Society statement
- Gynecomastia surgery candidates. American Society of Plastic Surgeons. (accessed October 6, 2026) Society statement
- Gynecomastia surgery recovery. American Society of Plastic Surgeons. (accessed October 6, 2026) Society statement
- Gynecomastia surgery risks and safety. American Society of Plastic Surgeons. (accessed October 6, 2026) Society statement
- Choosing a Safe & Successful Weight-loss Program. National Institute of Diabetes and Digestive and Kidney Diseases (NIH). (accessed October 7, 2026) Government page
- What is gynecomastia surgery, and is it right for you?. American Society of Plastic Surgeons. (accessed October 6, 2026) Society statement
Facts checked on October 6, 2026
Educational information, not medical advice. Talk with a qualified healthcare professional about your own situation. In an emergency call 911.