Frequently Ask Questions on Gynecomastia Gynecomastia is a disorder that causes male breast tissue to expand. While the precise etiology of gynecomastia is not always known, a number of factors might contribute to its development. Dr. Medha Bhave, a renowned plastic surgeon known for providing gynecomastia surgery in Thane has discussed the most commonly asked questions about gynecomastia. Causes of gynecomastia Several factors lead to gynecomastia. Here are some probable explanations: ● Hormonal Imbalances: Gynecomastia can occur as a result of hormonal abnormalities between estrogen (female hormone) and testosterone (male hormone). Estrogen promotes breast tissue development, whereas testosterone inhibits it. Imbalances might arise as a result of puberty, aging, or certain medical disorders.