Testoryze Reviews:Penis pumps involve placing a tube over the penis and then pumping out the air to create a vacuum. The vacuum draws blood into the penis and makes it swell. Vacuum devices are sometimes used in the short-term treatment of impotence. But overusing a penis pump can damage the tissue of the penis, leading to weaker erections. These products usually contain vitamins, minerals, herbs, or hormones that claim to enlarge the penis.