What Causes It?
Hormonal imbalance - An imbalance between the hormones estrogen and testosterone is the primary cause. All men produce some estrogen, but when the ratio of estrogen to testosterone shifts, breast tissue can grow.
Puberty - Temporary hormonal changes during puberty can cause breast tissue to swell. This typically resolves within six months to two years.
Aging - Hormone levels naturally change as men age, and gynecomastia is common in men aged 50 and older.
Medications - Various medications can cause gynecomastia as a side effect, including anti-androgens, anabolic steroids, HIV medications, anti-anxiety medications, antibiotics, ulcer medications, chemotherapy, and heart medications.
Recreational drugs and alcohol - Substances like alcohol, marijuana, heroin, methadone, and amphetamines can cause gynecomastia.
Health conditions - Several health conditions can cause hormonal imbalances leading to gynecomastia, including hypogonadism, hyperthyroidism, kidney failure, liver disease, and tumors of the testes, adrenal glands, or pituitary gland.
Obesity - Excess fat can create the appearance of enlarged breasts in men (pseudogynecomastia), which is different from true gynecomastia but may have similar psychological effects.
Klinefelter syndrome - This genetic condition affects male development, often resulting in gynecomastia along with other symptoms.
Malnutrition - Severe malnutrition can cause hormonal imbalances that lead to gynecomastia when normal nutrition is restored.
Herbal products - Some plant oils, like tea tree or lavender, have been associated with gynecomastia.
Signs & Symptoms
Breast tissue enlargement - Swollen or enlarged breast tissue in one or both breasts, sometimes unevenly.
Tenderness - Breast tissue may be tender or painful to touch.
Nipple sensitivity - Increased sensitivity or tenderness of the nipples.
Discharge from nipples - In rare cases, there may be discharge from one or both nipples.
Firm or rubbery tissue - Feeling of firm or rubbery tissue under the nipple area, which may extend towards the underarm.
Appearance changes - Visible changes in chest appearance, including increased fullness or protrusion of the breasts.
Psychological symptoms - While not physical symptoms, many men experience psychological effects including embarrassment, self-consciousness, avoidance of physical activities or intimacy, depression, and anxiety.