Hi..., I went through your query...
Gynaecomastia can be caused by an imbalance between the sex hormones
testosterone and oestrogen....
If the balance of hormones in the body changes, this can cause a man’s breasts to grow. Sometimes, the cause of this imbalance is unknown... Most cases of gynecomastia regress over time without treatment. However, if gynecomastia is caused by an underlying condition, treating the cause is necessary...