What the evidence actually says about every method of changing the number

This page exists because the search results for this question are, almost without exception, written by people selling the answer.

So: the evidence, sorted by category, with no product at the end of it. The summary is unwelcome and short: for men with ordinary anatomy, there is nothing here worth doing, and several things worth actively avoiding.

Pills, supplements, creams and patches

There is no evidence that any oral or topical product produces a change in size. There is no proposed mechanism by which one could: no combination of herbs, amino acids or vitamins causes an organ to grow in an adult.

What the regulatory record does show, repeatedly, is a different problem. Analyses of products in this category have found undeclared pharmaceutical ingredients, most commonly the active drugs used for erectile dysfunction, present in unknown quantities in a product bought without a prescription and taken without medical supervision. That is genuinely dangerous, particularly for anyone taking nitrates, and it is the actual risk of this category rather than the wasted money.

The reason these products work commercially is that they are frequently sold alongside something that does have an effect on erection quality, and an improvement in firmness is easily experienced as an improvement in size.

Vacuum pumps

Vacuum erection devices are legitimate medical equipment with a real indication: managing erectile dysfunction, particularly after prostate surgery, where they have a place in established practice.

For permanent enlargement they do not work. The engorgement is temporary by design, which is the point of the device, and there is a real injury risk from excessive or prolonged pressure, including bruising and vascular damage.

Traction devices

This is the one category where the honest answer is not simply no, and it deserves the nuance rather than being lumped in with the pills.

Penile traction therapy has a genuine clinical use in Peyronie's disease, where the aim is managing curvature rather than gaining length. Some studies of extenders in men without a condition have reported modest length gains, typically small, requiring several hours of wear a day sustained over months, from small samples, with high dropout rates and without long-term follow-up.

So the honest summary is: possibly a small effect, at a cost in time that almost nobody sustains, on evidence thin enough that professional bodies do not recommend it for men with normal anatomy. It is the least fraudulent option in the category and it is still not a good idea.

Surgery

The serious end, and the one where the stakes stop being financial.

Suspensory ligament release works by releasing the ligament that holds the penis against the pubic bone, which changes the angle at which it sits and can increase visible flaccid length. It does not increase erect length, and cutting that ligament can affect the stability of an erection.

Girth augmentation by injection, grafting or implant carries a documented risk profile including asymmetry, nodularity, migration of injected material, scarring, infection and loss of sensation.

The finding that recurs across the surgical literature is about satisfaction rather than about millimetres. Reported dissatisfaction after cosmetic procedures in men with normal anatomy is high, and it is high for a reason that should be predictable by now: the distress was never proportional to the measurement, so changing the measurement does not resolve it. Professional urological bodies advise against these procedures outside genuine clinical indications, and that advice is grounded in outcomes rather than in conservatism.

The whole field, honestly

What does have evidence behind it

Two things, and neither involves the body.

Structured education and counselling, which the literature repeatedly finds resolves the concern in a substantial share of men who present with it. An actual measurement, an explanation of the distribution, and correction of the specific false beliefs a man has assembled about what is typical.

Cognitive behavioural therapy, for the checking, avoidance and comparison pattern that maintains the distress, and for body dysmorphic disorder where the presentation meets that threshold.

Sit with the shape of that for a moment. The interventions with an evidence base treat the distress, and they work. The interventions with no evidence base treat the anatomy, and they are the ones with the advertising budget. Every incentive in this market points away from the thing that helps.

The one-line version

If you have ordinary anatomy and you are unhappy about it: nothing you can buy will fix it, several things you can buy will hurt you, and the thing that works is a conversation with a clinician who has nothing to sell you.

That sentence earns nobody anything, which is roughly why you had to come to a page with a guessing game on it to read it.