Chest Fat
What Causes Enlarged Male Breasts?
Explore fatty tissue, glandular changes, medications and other potential causes of male breast enlargement without relying on a self diagnosis.
Educational article. Sources listed below. Not medical advice.
There is more than one possible cause
An enlarged male chest may reflect fatty tissue, glandular tissue or both. Overall weight gain can contribute to fatty tissue in the chest. True gynecomastia is related to the balance of estrogen and testosterone effects on breast tissue. The cause cannot be determined from body weight alone. A lean person can have gynecomastia, while a larger person may have chest fat without glandular enlargement.
Hormones, life stages and health conditions
Hormonal changes can occur during puberty and later adulthood. Some conditions affecting the testes, thyroid, liver or kidneys may also be associated with breast enlargement. Having enlarged breasts does not mean that you have one of these conditions. A clinician uses your history and examination to decide whether investigation is appropriate rather than ordering the same hormone panel for everyone.
Medicines and other substances
Certain medicines, anabolic steroids and some other substances may be associated with gynecomastia. Tell your healthcare professional about all prescribed and nonprescribed medicines, supplements and substance use. Bring labels or a complete list if possible. Never stop an important prescribed medicine on your own. If a medicine is a possible contributor, the prescriber can weigh alternatives against the reason you need treatment.
Choose evaluation rather than assumptions
New changes, pain, a hard lump, discharge or skin changes warrant a medical appointment. Weight management may help with fatty tissue, but waiting to lose weight is not a substitute for assessing concerning symptoms. Avoid products marketed as hormone fixes or guaranteed cures. Review our comparison of chest fat and gynecomastia, and use the ebook as background education rather than a diagnostic tool.