Merck Manual

Please confirm that you are not located inside the Russian Federation

What Happens When the Prostate Gland Enlarges?
What Happens When the Prostate Gland Enlarges?
What Happens When the Prostate Gland Enlarges?

In benign prostatic hyperplasia, the prostate gland enlarges. Normally the size of a walnut, the prostate gland may become as large as a tennis ball. The enlarging prostate gland squeezes the urethra, which carries urine out of the body. As a result, urine may flow through more slowly, or less urine may flow through.