Can Traction Help a Curved Penis (Peyronie's)? What Is Known, and What Is Marketing

Affiliate disclosure: This article contains affiliate links. If you buy through a link on this page, we may earn a commission paid by the manufacturer, at no extra cost to you. That never changes what we publish — and this is the page where it matters most, because the honest version of this answer starts with a doctor, not a checkout. Penile curvature — Peyronie's disease — is a medical condition with a medical literature, and traction genuinely appears in that literature. But the extender sold on this site is not sold as a Peyronie's treatment, its maker publishes no curvature-correction figure for it, and nothing here is a substitute for a urologist's assessment of your specific case. If you read only one paragraph, read this one.

Quick Answer: A Real Clinical Topic, an Unproven Consumer Shortcut

Penile traction therapy is one of the non-surgical approaches urologists have actually studied for Peyronie's disease — published work, including a 2008 study by Levine and colleagues cited across the traction literature, reports curvature reductions in some men, and traction is also used in urology to limit length loss. That is the true part. The marketing part is the leap from "traction is studied for Peyronie's" to "this consumer device will straighten your penis." For ProExtender, the maker makes no direct Peyronie's or curvature-straightening claim on its homepage at all, publishes no curvature-correction percentage or degree figure, and prints no guidance on who with Peyronie's should or should not use the device. If curvature is your reason for reading, the order of operations is: urologist first, device decision second — with the doctor knowing a device is part of the plan.

What Peyronie's Disease Is — and Why Self-Treatment Is Risky

Peyronie's disease is a wound-healing disorder of the penis: fibrous scar tissue (plaque) forms in the tunica albuginea, the sheath around the erectile chambers, and the scarred segment cannot stretch like the tissue around it. The result is curvature during erection — sometimes slight, sometimes severe enough to make intercourse difficult or impossible — often with some loss of length, and in the early, "active" phase, frequently with pain. The condition has phases: an active phase (often 6–18 months) in which the curve can still be changing and pain is common, and a stable phase in which the deformity settles.

That natural history is why a doctor comes first. A changing curve needs a diagnosis before it needs a device: new curvature can occasionally signal other problems, the phase determines what treatment even makes sense, and traction applied aggressively to an actively inflamed, painful plaque is a different risk proposition from traction in the stable phase. No extender maker's page — including this one's — can assess any of that for you. A urologist can, usually in one visit.

What the Traction Literature Says About Curvature

Traction for Peyronie's is not fringe. It has been studied as a primary therapy in stable disease, as a way to reduce length loss, and alongside other treatments. The study most often cited is Levine et al. (2008), reported in the traction literature as showing curvature reductions of roughly 10–45 degrees in men who used traction therapy; it is cited, for example, on the evidence pages of a competing device maker (SizeGenetics), which positions its own device explicitly for curvature correction and publishes a list of men who should consult a doctor before use. Later clinical work has kept traction in the urology conversation, particularly for men who want to avoid or delay surgery or injections.

Read those findings with the same discipline as everything else on this site. The studies are small. Protocols vary widely — device type, daily hours, and months of use differ from study to study, so "traction helped curvature in a study" does not specify a routine you can copy from a sales page. And the studied populations were diagnosed, assessed men, usually in the stable phase — not self-selected shoppers. The class-level evidence picture for traction generally is set out in Do Penis Extenders Actually Work?; curvature is the one area where the clinical interest is strongest, and it is still not a promise about any individual device or any individual curve.

What ProExtender's Maker Actually Says About Curvature

Very little — and the little is worth stating precisely, because extender marketing elsewhere implies much more. On the maker's pages, Peyronie's appears in exactly two places:

• The 1998 study summary on its Proven Results page lists Peyronie's disease among the "medical indications" in that study's design — alongside post-surgical cases. The study itself (18 men, 12 hours a day) was a lengthening study; its published conclusions report length results, not curvature outcomes.
• A site article says penis extenders generally "are designed to help men with Peyronie's disease or the 'crooked' or 'curvy' penis," and that ProExtender has helped men "who suffer from a crooked penis." That is a general statement about the device class, with no figure, no study and no protocol attached.

And that is all. No curvature-correction percentage. No degrees. No Peyronie's protocol, no phase guidance, no exclusion list, and no "consult your doctor" warning anywhere in the maker's material — the Usage Guide states the device does "not require experience or the help of a doctor." For an enlargement buyer, that silence is a paperwork gap. For a man with a medical condition the maker itself lists as an indication in its own study summary, it is the reason this article exists: the maker will not have the curvature conversation with you, so have it with a urologist instead.

If You Are Considering Traction for Curvature: The Sensible Sequence

• Get the diagnosis first. Confirm it is Peyronie's, learn which phase you are in, and have the curve measured. A device bought before that visit is a guess stacked on a guess.
• Ask the urologist about traction specifically. It is a legitimate question — traction is in their literature, and some urologists recommend it, including to counteract length loss. Ask about daily hours, duration, and what improvement is realistic for your measured curve.
• Ask what would make traction a bad idea in your case. Active-phase pain, recent injury, implants, bleeding disorders and healing problems are the kinds of factors a clinician screens for; no consumer page screens for them (one competing maker's published caution list covers exactly these — ProExtender's publishes none).
• If you proceed, treat the maker's gentlest instructions as the ceiling. Start-up at minimum traction, stop for pain, and re-check with the doctor — not the homepage, which claims the process is "completely painless" while its own guide anticipates soreness and warns "don't go to extremes."
• Revisit expectations at the guarantee deadline. ProExtender's 6-month guarantee is framed by its Usage Guide as following "diligent, documented use," with no refunds for a device damaged in use or assembly — the full terms are in ProExtender, Answered. Document your wear from day one if you intend to rely on it.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is educational and is not medical advice.

Disclaimer: This article is for general information only and is not medical advice. Peyronie's disease is a medical condition that requires professional assessment. Always consult a qualified healthcare professional — ideally a urologist — before using a traction device for curvature, especially if you have pain, a changing curve, a medical condition, or take prescription medication. Individual results vary, and no result is guaranteed.

Last reviewed: October 2026