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What Causes Gynecomastia? Causes, Treatment Options, and Recovery

Dr. Tina Jenq, MD
Board Certified Plastic Surgeon · Published September 26, 2025 · Updated October 26, 2026

Quick answer

Gynecomastia is enlarged breast tissue in men, on one side or both. The most common cause is idiopathic, meaning the tissue grows without a clear medical reason; other causes may include hormone changes, certain medications, or weight gain. Treatment depends on the amount of breast tissue and how well the skin can contract after removal.

Gynecomastia is a condition where men develop enlarged breast tissue. This can happen on one side or both. Many men with gynecomastia feel self-conscious, embarrassed to take off their shirt, or even hide behind baggy clothes. Surgery can help restore confidence and comfort.

What Causes Gynecomastia?

There are several reasons why gynecomastia can develop. The most common cause is idiopathic, which means the tissue grows without a clear medical reason. Other causes may include hormone changes, certain medications, or weight gain. No matter the cause, many patients want a lasting solution.

Treatment Options

Treatment depends on two main things: the amount of breast tissue and the skin’s ability to contract after removal. Younger patients, or those with fewer stretch marks, often see better skin tightening. Surgery may involve removing glandular tissue, fat, or excess skin, depending on the severity.

Why Patients Choose Surgery

Gynecomastia can affect not only appearance but also self-esteem. Many patients describe avoiding activities like swimming or working out without a shirt. Surgery offers a way to remove the unwanted tissue, flatten the chest, and reduce the stress of hiding under clothing.

Recovery After Surgery

Recovery from gynecomastia surgery is usually straightforward. Patients often need pain medication for about 3 to 4 days. Light walking and daily activities are usually possible within the first week. Some people may feel tired for about 3 weeks. Most return to work in around 3 weeks, depending on the job.

Final Thoughts

Gynecomastia is common and treatable. If it affects your confidence or lifestyle, surgery may be the right option. Talking with a Board Certified Plastic Surgeon can help you explore the best treatment for your needs and goals.

Learn more about gynecomastia surgery with Dr. Jenq or book a consultation.

Frequently asked questions

What causes gynecomastia?

The most common cause is idiopathic, which means the tissue grows without a clear medical reason. Other causes may include hormone changes, certain medications, or weight gain.

Can gynecomastia happen on only one side?

Yes. Gynecomastia can happen on one side or both.

How is gynecomastia treated?

Treatment depends on the amount of breast tissue and the skin’s ability to contract after removal. Surgery may involve removing glandular tissue, fat, or excess skin, depending on the severity.

How long is recovery after gynecomastia surgery?

Patients often need pain medication for about 3 to 4 days, and light walking and daily activities are usually possible within the first week. Most return to work in around 3 weeks, depending on the job.

Dr. Tina Jenq

About the author

Dr. Tina Jenq, MD is a Board Certified Plastic Surgeon and the founder of Oregon Cosmetic and Reconstructive Clinic in Happy Valley. She performs every part of her patients’ surgery herself. About Dr. Jenq

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