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.
Penis pumps are a mechanical form of penis exercise. Penis pumps come in a variety of designs, with different features; however, the basic principles of penis pumps are the same. A cylinder goes over the penis and a pump, either manual or electric, creates a partial vacuum within the cylinder. This decreased pressure causes the tissues in the penis to expand and fill with blood. Some of the most popular penis pumps include: the Bathmate and the Penomet (both water-assisted pumps); the Phallosan; and the Passion Pump.