Penis Enlargement - Penis Pump

A penis pump is a cylinder that is fitted over the penis, with a manual or motorized pump to create a partial vacuum around the penis, engorging it as blood is drawn in. As vacuum increases, the pressure within the blood vessels of the penis increases as well; excessive vacuum causes vascular damage.

Penis pumps may be used to temporarily overcome symptoms of impotence, but do not cure the condition: a tourniquet-like ring must be applied to keep the blood trapped within the penis, otherwise the erection will immediately subside. Pumps may work even if there is nerve or vascular damage preventing a natural erection, but excessive or prolonged use (hours) will cause permanent harm.

Pumping must be done very carefully to avoid serious injury: over-enthusiastic pumping can burst blood vessels and form blisters.

The effectiveness of penis pumps for permanent penis enlargement was examined by Kazem, Hosseini and Alizadeh. They studied 37 men with penis length less than 10 cm and found no significant change in penile length after using pumps for six months, although the follow-up have found 30% satisfaction with the method. The conclusion of the paper stated that vacuum treatment of the penis is not an effective method for penile elongation, but provides psychological satisfaction for some men.

In the US, penis pumps may be covered by Medicare if they are deemed medically necessary.

Pumps have been used to successfully treat men with Peyronie's disease, which causes unusual shortening and curvature of the penis. A 31-patient study conducted by the Department of Urology at St Peter's Hospitals and the Institute of Urology in London found, "clinically and statistically significant improvement in penile length, angle of curvature, and pain after 12 weeks of vacuum pump use". In this study, subjects with Peyronie's undertook two ten-minute pumping sessions per day for twelve weeks. The additional penis length, an average of 0.5 centimetres (0.20 in) was an unexpected side effect found in approximately one third of the subjects and not an intended aim of the study.