Male breast reductions are mostly conducted to correct a condition called Gynecomastia. Though this condition affects 40 to 60 percent of all men, to some extent and the condition quite frequently only affects one breast. The procedure is aimed to make their chests appear more symmetrical. Though there are many potential causes, the exact cause of Gynecomastia is unknown.
Excess breast tissue can develop in young boys during puberty which generally disappears within a year. Obesity, excessive alcohol consumption, tumors, genetic disorders, chromosomal abnormalities, impaired liver function and the use of medications that contain estrogen are other reasons for the same.