Enlarged Male Breast Tissue (Gynecomastia)
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.
What causes gynecomastia?
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.
https://my.clevelandclinic.org/health/diseases/16227-enlarged-male-breast-tissue-gynecomastia