Increase in breast fat
- This is actually medically known as ‘pseudogynaecomastia’ as it is not true breast tissue, it is just increased fat – usually from weight gain.
- Medication – many drugs can cause breast growth
- Liver disease
- Overactive thyroid
- Kidney failure
- Bodybuilders using anabolic steroids
- Rare tumours
If the breast growth is caused by hormonal imbalance, the female hormone oestrogen is more dominant than the male hormone,testosterone, causing the unwanted breast growth.