Gynecomastia is often due to an imbalance of testosterone and estrogen hormones. Certain medications and diseases can also cause male breast tissue to swell and get bigger. Enlarged breasts in boys and men often improve without treatment. If this condition makes you self-conscious, you may consider breast reduction surgery.
Gynecomastia is a common condition which results in enlarged male breast tissue. It can be seen in males of all ages, but usually occurs during the newborn period, puberty and older adulthood. There are many causes for gynecomastia, most commonly an imbalance of the hormones testosterone and estrogen.
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Gynecomastia can be seen as a button-sized growth underneath the nipple. You may be able to see this as a breast lump or feel it when you press on the area. The lump may move easily within the breast tissue and may be tender to touch. Breast lumps and breast enlargement may occur in one or both breasts.
Gynecomastia is the most common male breast disorder. It affects between 50 to 65% of boys and men worldwide.
Gynecomastia can occur at different times, including:
An imbalance between estrogen and androgen hormones typically causes gynecomastia. Men’s bodies usually produce small amounts of estrogen, the hormone that controls breast growth. If your body produces too much estrogen, or you have low testosterone (hypogonadism), your breasts may enlarge.
Sometimes people with obesity develop enlarged breasts due to excess fatty tissue. This condition is known as pseudogynecomastia.
Certain conditions can cause male breast enlargement, including:
Gynecomastia can result from taking medications to treat:
These drugs also can cause breast swelling:
Your healthcare provider will assess symptoms, perform a physical exam and review your medical and family history. A blood test may also be recommended to check hormone levels.
Because both gynecomastia and breast cancer cause breast lumps, your provider may order a:
Some people don’t want or need treatment for gynecomastia. If a medication or other substance is causing breasts to enlarge, you may need to stop using the drug or switch to a different one. If a disease is the cause, swelling should go away with disease treatment.
Some men choose to get breast reduction surgery. During this procedure, a plastic surgeon removes breast tissue to make breasts smaller.
You can’t prevent many of the hormone changes that cause gynecomastia. If needed, you may reduce your risk of breast enlargement by switching medications or seeking treatment for a substance use disorder.
You should call your healthcare provider if you experience:
You may want to ask your healthcare provider:
Studies suggest that men with gynecomastia have a slightly higher risk of breast cancer. You should see your healthcare provider anytime you feel or notice unusual breast changes.
Male breast enlargement often goes away over time or with medication changes. Some men become self-conscious about their appearance, which may lead to depression and anxiety. But these problems should improve once gynecomastia is treated.
A note from Cleveland Clinic
If you’re uncomfortable about your breast size, don’t be embarrassed to talk to your healthcare provider. Your provider can pinpoint the cause of the condition. If a medication or disease is to blame, medication changes and disease treatments may help. Swollen breast tissue often shrinks over time. If you’re feeling anxious about how you look, talking to a mental health professional may help.
Last reviewed by a Cleveland Clinic medical professional on 09/08/2021.
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Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy