Health Library
The Health Library is a collection of health and wellness resources created for learning and accessibility. Select a topic below for related health information or search for a topic in the search bar for more information on other medical conditions.
Gynecomastia
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What is gynecomastia? Gynecomastia is overdevelopment of the male breast. In response to too much estrogen (a female hormone) or too little testosterone (a male hormone), the glandular tissue of the breast swells and forms a breast bud (enlarged breast). Gynecomastia can occur in babies, teen boys, and older men...