Benign prostatic hyperplasia (BPH):- is a male hormone that can build up in the prostate and may cause prostate growth. These drugs may lower the risk of BPH problems.

Benign prostatic hyperplasia, a noncancerous enlargement of the prostate gland, is the most common benign tumor found in men
Benign prostatic hyperplasia — also known as an enlarged prostate — is a common, but treatable urinary condition in older men. An enlarged prostate is often called benign prostatic hyperplasia (BPH). It is not cancer, and it does not raise your risk for prostate cancer.

Some facts about prostate enlargement:
The likelihood of developing an enlarged prostate increases with age.

BPH is so common that it has been said all men will have an enlarged prostate if they live long enough.
A small amount of prostate enlargement is present in many men over age 40. More than 90% of men over age 80 have the condition.

No risk factors have been identified, other than having normally-functioning testicles