What Is Dangerous Penis Training? Why to Avoid Jelqing, Clamping, and Hanging

The phrase “penis training” can include everything from pelvic-floor exercise to direct pulling and constriction of the penis.

The same label does not make the methods equally safe.

BananaUp does not include jelqing, milking, clamping, hanging, squeeze-type methods, strong manual stretching, or self-directed strong traction as Routines. It also does not provide step-by-step instructions for changing size or erections with them.

Jelqing does not have established clinical effectiveness data

Jelqing is described as applying repeated mechanical force to the penis by hand.

The 2026 International Consultation on Sexual Medicine recommendations state that there are personal reports of increased length, but insufficient data to support clinical effectiveness (Chung et al., 2026).

The same recommendations note that penile injuries are not rare and can lead to deformity (Chung et al., 2026).

The strength-training idea “continue and the tissue will grow” cannot be applied to the penis in the same way.

See “Does Jelqing Work?” for the evidence and risks in more detail.

Clamping has no evidence that trapping blood creates growth

Clamping is presented online as a way to restrict or obstruct blood flow to the penis.

Medical vacuum devices may use a purpose-designed device and constriction ring for ED. That is not evidence that stronger constriction increases size (Chung et al., 2026).

When a constricting object cannot be removed, penile strangulation is an emergency condition described in many urologic case reports (Silberstein et al., 2008).

A 2024 review summarized 100 cases reported from 2000 to 2019 and found lasting problems after release in 24 cases (Campbell et al., 2024).

Strong or prolonged circulatory restriction can damage skin and tissue and cause ischemia.

BananaUp does not treat clamping as an enlargement Routine.

Hanging is not medical traction therapy

Attaching weights to the penis to create strong traction is different from Penile Traction Therapy studied in medicine.

Clinical studies of dedicated traction devices exist, and the 2026 ICSM recommendations describe limited length increases (Chung et al., 2026).

That does not show that stronger force or heavier weights produce the same result.

The equipment, force management, and participants in the studies cannot be ignored when applying the result to a self-directed method.

BananaUp does not provide instructions for hanging or strong self-traction.

“It does not hurt” does not prove safety

The absence of immediate pain does not show that mechanical force was safe.

Male genital injuries can have long-term effects on sexual function. The 2026 ICSM recommendations on male genital trauma also emphasize possible effects on later sexual function (Chung et al., 2026).

Circulatory injury from constriction can become more serious after time has passed.

Do not continue by telling yourself that numbness or purple color will simply go away.

Medical VEDs and traction devices are not automatically dangerous

This distinction matters.

Vacuum Erection Devices used in urology have an established medical role in ED care. Dedicated Penile Traction Therapy devices also have limited clinical research on penile length (Chung et al., 2026).

The problem is replacing a medically studied method with self-directed constriction, hand techniques, or weights.

The existence of a clinician-managed method does not make a similar DIY approach safe.

Lower-risk Routines that BananaUp can record

BananaUp’s “penis training” scope does not apply strong force directly to the penis.

It records pelvic-floor contraction and release, Cardio such as Walking, Strength including lower-body exercise, sleep, and stress as separate Routines.

These options do not promise a universal ED improvement, but they are not the same as direct external force from jelqing or strong traction.

Stop and seek medical care for severe pain, swelling, extensive bruising, numbness, skin discoloration, sudden curvature or deformity, or an abrupt change in erections after a direct method.

If a constricting device will not come off and penile color or sensation has changed, do not wait with an article or Routine; seek urgent medical care.

Enlargement supplements and creams are a separate category

Products marketed as penis-enlargement supplements, creams, or lotions are also sold, but reliable evidence that pills or lotions permanently enlarge the penis is lacking (Mayo Clinic Staff, 2025). They are separate from direct penis-training methods, so this article does not provide product or use details. Evidence about ED supplements should not be confused with claims about penis enlargement.

For lower-risk options, use the Routine Finder to review pelvic-floor, Cardio, and Strength choices.