: Proponents on internet forums often claim gains in both length and girth, suggesting the exercise creates "micro-tears" that heal to increase tissue size—a theory based on a flawed comparison to weightlifting. Clinical Reality : Reputable medical bodies like the Mayo Clinic Sexual Medicine Society of North America (SMSNA)
| Injury | Prevalence | Reversibility | |--------|------------|----------------| | | Very common | Heals in 2-4 days | | Thrombosed lymph vessel | Moderate | Weeks to months | | Hard flaccid syndrome | Low but serious | Can be permanent | | Peyronie’s disease (plaque) | Low | Often permanent | | Nerve damage (numb glans) | Rare | 6-12 months | | Complete penile fracture | Extremely rare | Surgical emergency | jelqing before after results