Final answer:
The condition of overdevelopment of breast tissue in men or boys is known as gynecomastia, which is often attributed to hormonal imbalances, such as an excess of estrogen or lack of testosterone. It is common during puberty but can also be associated with obesity, medication use, or certain medical conditions.
Step-by-step explanation:
The overdevelopment of breast tissue in men or boys is referred to as gynecomastia. This condition can arise from various causes, including hormonal imbalances. In particular, when there is an excess of female hormones like estrogen or a lack of male hormones, such as testosterone, breast development in men can occur. The imbalance may be a result of natural hormonal changes, such as during puberty, or it can stem from other factors like obesity, use of certain medications, or health conditions that affect hormone levels.
During puberty, it's common for boys to experience a temporary form of gynecomastia as their hormone levels fluctuate. However, persistent or concerning breast tissue development may require medical attention, as it could indicate more serious underlying conditions. Gynecomastia can also lead to psychological or emotional challenges due to the changes in body image.