How do penis pumps work?

Penis pumps work primarily through the mechanism of creating a vacuum around the penis. When the pump is used, it expels air from the cylindrical tube in which the penis is placed. This vacuum increases blood flow to the penis, which can lead to an erection or increase the girth and length temporarily. The increased blood flow is facilitated by the negative pressure, which causes the blood vessels in the penis to expand, filling the erectile tissue.

The effect of a penis pump is generally temporary, primarily used for achieving an erection in cases of erectile dysfunction or for enhancing girth before sexual activity. Regular use under proper guidelines can also help in maintaining erectile function, especially post prostate surgery. However, overuse or improper use can lead to tissue damage, so it should be used cautiously and preferably under medical advice.