Penis enlargement procedures  are techniques reported to make the human penis larger.

This is frequently the goal of men dissatisfied with their penis size. In general, where there is a perceived need to increase penis size, some  safe self-treatment methods should be tried rather than attempting medical surgery.  This is believed to be effective but extremly dangerous.

Very few men have a very small penis: this is known as a micropenis, and is a very unusual condition which will generally have been detected in early childhood. Penis-enlargement self-treatments are not effective on this condition.

Self-treatment methods

Cosmetic

Rather than attempt to change the actual size of the penis, one may make it appear bigger, by trimming the pubic hair or by losing weight, which may be of particular use if one is overweight.

Pills

"Penis enlargement pills" or ointments are commonly offered over the Internet; these, for the most part, are  scams.Analyses performed by Flora Research of California and by the University of Maryland have uncovered harmful contaminants in a number of "penis enlargement" pills. Contaminants found included mold, yeast, dangerous E. coli bacteria, pesticides, and. Dr. Michael Donnenberg of the University of Maryland has described herbal pills marketed by Performance Marketing Ltd. as having "heavy fecal contamination", possibly from animals grazing near the plants harvested for herbal ingredients. There may however be a placebo effect i.e. a psychological effect of making the user think he has a larger penis, and increasing his confidence, when there is no actual change to his penis size. Some people have also reported that such pills make them feel sexually aroused, and give them harder erections, but again, without any actual growth of the penis.

Penis pump

A penis pump is a cylinder that is fitted over the penis, with a manual or motorized pump to create suction. As the apparatus creates a vacuum around the penis, blood is drawn into the penis causing it to become engorged. The higher the vacuum, the higher the blood-pressure becomes within the penis; excessive pressure causes vascular damage rather than a harder penis.

Pumping must be done very carefully to avoid injury: manufacturers' instructions should be followed. Manual pumps often recommend a gentle pump followed by a pause, then repeated. Over-enthusiastic pumping can burst blood vessels and form blisters. In some cases the testicles can be unexpectedly pulled into the cylinder and cause severe pain and injury. It is also believed that the rim of the cylinder can cut into the skin and over time cause damage to the ligaments surrounding the penis. These dangers are easily avoided by following instructions. 

Penis pumps, usually described in this context as vacuum pumps, have use in conventional treatment of impotence. The pump itself is essentially as described above, although often made to higher standards of quality with a much higher price, and arrangements for distribution by suppliers of medical equipment. One or more flexible compression rings are fitted on the open end of the cylinder, then an erection is created by pumping. The rings are pushed by hand onto the base of the erect penis before releasing the vacuum. This enables the erection to be held even in the presence of problems of the vascular or nervous system which would otherwise lead to immediate loss of erection. In the best circumstances erections can be maintained for a considerable time, but manufacturers' literature recommends that rings should be removed after not more than 30 minutes for safety.

Jelqing and clamping

Jelqing is a method intended to enlarge the penis by increasing the blood pressure in the penis, with the goal of permanently increasing the maximum erect size of the penis. This technique, also called "milking", involves wrapping the thumb and index finger around the penis while semi-erect and repeatedly drawing them away from one's body to force blood into the glans, thus encouraging more vascularity in the corpus cavernosa and associated tissues. Whether jelqing actually works or not is a subject of controversy.

 Jelqing is typically preceded by a warmup with a hot compress on the genitals, and concluded the same way.

Clamping is a technique that uses a constricting device, such as a shoe string, cable clamp(CableClamp/CableCuff), or a tight cock ring. The clamp is firmly tied, clamped, or put, respectively, on the base of the erect penis while "edgeing" (extended masturbation) with a firmly erect penis.

Stretching and hanging

Stretching consists of gripping the glans, or just behind the glans, and pulling for a set period of time. Giving a similar effect, hanging consist of attaching a device that grips the glans or just behind the glans and allows a weight to be suspended for specific amount of time.

The idea behind such exercises is to stretch the tunica albuginea and other various tissues of the penis. The general effect is to elongate the penis, although widening can also occur.