Although there are a number of causes for gynaecomastia, hormonal imbalances account for the majority of cases. Nearly 70% of pre-teen boys and up to 65% of older men experience it, making it most prevalent in puberty and in men over 60. Although males of any age can be affected, it is more common in these specific age ranges because during these periods hormones are more likely to become unbalanced.
Both men’s and women’s bodies contain oestrogen and testosterone; however, the former is higher in females and the latter in males. Elevated oestrogen levels promote the growth of glandular breast tissue and inhibit the body’s production of testosterone. Gynecomastia is frequently caused by an increase in oestrogen and a reduction in testosterone.
Because hormones are triggered during puberty, gynecomastia may appear in pre-teens with elevated oestrogen levels. The same is true for men who go through what some refer to as “manopause” later in life. Your body is once more attempting to balance hormone changes after the age of 50 when your testosterone levels start to decline. In addition to fluctuating hormone levels, gynecomastia can also result from:
- Elevated oestrogen hormones linked to excess fat.
- Use of prescription opioids, alcohol, and illicit substances (such as marijuana)
- Use of drugs to treat anxiety and depression
- Disorders such as hyperthyroidism, liver disease, or kidney disease
- Use of steroids that increase muscle mass