A penis should be inserted into a cylindrical tube (called penis pump) up to the base of the. Then a manual or battery powered pump connected to it creates a vacuum, which causes blood to rush to the penis and make it enlarge. Care should be taken not to indulge in excess pumping there could be a possibility of blood vessels bursting leading to permanent damage to the penis. So you are cautioned against over pumping.
This penis pump is a medical device that is generally used for those men who suffer from Peyronie's Disease. This is the condition in which penis becomes extremely curved, shortened and becomes impotent. The sufferer may not be able to get an erection. However, penis pump is known to provide significant improvement in penile length, straighten the curvature after few weeks of regular use of penis pump.
It is noted that outcome of penis pumping will not give permanent results. Soon after the pumping session, users can feel some sort of short-term gain in both length and width of the penis and it can be useful for immediate or short-term psychological satisfaction. After the pumping, users can remove the condom and put on an erection ring to trap blood in the penis to sustain an erection for some time.
It should be remembered that using penis pump for increasing the length of the penis can lead to injury and it comes with a risk of permanently damaging the penis nerves. So, it is highly recommended to take your physician's consent before beginning to try it.