Last updated on June 15, 2026
A bend or curve during erections can develop for several reasons, including Peyronie’s disease, scar tissue changes, injury or congenital curvature that becomes more noticeable over time.
For some men, the curve is mild and stable. For others, it appears to worsen gradually or becomes associated with pain, shortening or erection changes. One of the most important distinctions is whether the shape has always been present or whether it has developed more recently.
Many men first notice subtle changes rather than a sudden deformity. An erection may begin curving slightly upward, to the side or downward. Others notice an area that feels firmer than before, discomfort during sex or a reduction in rigidity.
Although new curvature can understandably cause anxiety, it does not automatically mean severe disease or urgent treatment is required. Assessment is often more useful than panic, particularly if symptoms are changing or beginning to affect sexual function.
Peyronie’s Disease as a Common Cause of Penile Curvature
Peyronie’s disease is one of the most common causes of acquired penile curvature and occurs when scar-like tissue develops within the penis.
Unlike congenital curvature, which is usually present from adolescence, Peyronie’s disease develops later in life. The condition is associated with areas of fibrous plaque that reduce flexibility in part of the penile tissue during erections. As the surrounding tissue expands unevenly, the erection may begin to bend toward the affected area.
Curvature can vary considerably between men. Some notice a mild upward bend that changes slowly over several months. Others develop more pronounced curvature, narrowing, indentation or shortening.
Common symptoms may include:
- a new bend during erections
- pain or discomfort
- palpable lumps or firmer areas
- reduced erection quality
- shortening or narrowing
Peyronie’s disease symptoms often develop gradually. A man may initially notice mild soreness during erections before recognising that the shape of the penis is beginning to change.
During the earlier active phase, curvature and discomfort may continue evolving. In the later stable phase, changes are often more settled. Understanding the stages of Peyronie’s disease can help explain why symptoms and treatment discussions differ between patients.
If curvature, pain or erection changes continue progressing, assessment may help clarify whether symptoms are consistent with Peyronie’s disease symptoms or another cause.
Scar Tissue Development Inside the Penis
Penile curvature often develops when areas of scar tissue reduce the elasticity of the penis during erections.
A simple way to picture this is to imagine one side of a balloon becoming less flexible than the other. As pressure increases, the more elastic side expands normally while the tighter area resists stretching. In the penis, this uneven expansion can create bending, indentation or narrowing during erections.
The scar tissue associated with Peyronie’s disease is commonly referred to as plaque. Some men can feel this as a firmer area beneath the skin, while others notice curvature before identifying any obvious lump.
The degree of curvature does not always reflect the amount of plaque present. Some men develop relatively mild bends, while others experience more significant deformity despite subtle tissue changes.
Penile Injury or Micro Trauma During Sex
Repeated minor trauma during sex or physical activity is thought to contribute to Peyronie’s disease development in some men.
This does not necessarily involve a dramatic injury or sudden “snap”. In many cases, men do not remember a specific event at all. Instead, specialists believe repeated small areas of stress or bending may trigger abnormal healing responses within the tissue over time.
A common example is a man who notices soreness after vigorous intercourse but thinks little of it initially. Several months later, he begins noticing a gradual upward bend or reduced flexibility during erections.
Not every man exposed to penile trauma develops Peyronie’s disease, which is one reason researchers believe other factors such as genetics and healing response also play a role.
Importantly, this is not about blame or sexual behaviour. Many men with Peyronie’s disease have no obvious history of significant injury.
Inflammation That Leads to Plaque Formation
Inflammation during healing may contribute to plaque formation and changes in penile tissue flexibility.
When tissue is injured, the body naturally attempts to repair it. In some men, this healing response appears to produce excess scar tissue, which may gradually alter the way the penis expands during erections.
The process is not always predictable. Some men develop mild stable curvature, while others experience progressive changes over time. Pain during erections is more commonly associated with the earlier inflammatory phase, although not every patient experiences pain.
Researchers continue studying why some healing responses lead to persistent plaque formation while others do not.
Genetic Factors Linked to Peyronie’s Disease
Some men may have a genetic tendency toward abnormal scar tissue formation, which could increase the likelihood of developing Peyronie’s disease.
This does not mean the condition is directly inherited in a simple way, nor does it mean a man will inevitably develop curvature if a relative has experienced similar problems. However, researchers have identified associations between Peyronie’s disease and certain connective tissue disorders involving abnormal scarring.
Genetics may partly explain why some men develop significant plaque formation after relatively minor tissue stress while others do not.
Age Related Changes in Penile Tissue
Age-related tissue and vascular changes may increase susceptibility to Peyronie’s disease, particularly in middle-aged and older men.
As tissue elasticity changes over time, healing responses may become less predictable. Erections may also become more dependent on underlying vascular health, which can influence how penile tissue tolerates mechanical stress.
Ageing alone does not cause Peyronie’s disease, and younger men can also develop acquired curvature. However, the condition is more commonly recognised later in adult life.
Connective Tissue Disorders Associated With Peyronie’s Disease
Some connective tissue conditions appear more commonly in men with Peyronie’s disease, suggesting shared scar tissue mechanisms.
One example is Dupuytren’s contracture, a condition affecting tissue within the hand that can cause finger contractures over time. Not every man with Peyronie’s disease develops related conditions, and vice versa, but the association supports the theory that abnormal wound healing and scar formation may contribute to both.
These associations are still being studied and should not be viewed as definitive predictors of disease.
Previous Penile Surgery or Medical Procedures
In some cases, penile surgery, catheterisation or medical procedures may contribute to tissue changes associated with curvature.
Scar formation can occur after procedures involving penile tissue, although this does not mean curvature is inevitable or that a procedure was performed incorrectly. Healing responses vary considerably between individuals.
For some men, tissue changes remain minor and stable. Others may notice increasing curvature or erectile changes during recovery.
When Curvature May Be Congenital Rather Than Peyronie’s Disease
Some men naturally have a mild penile curve from adolescence onwards, which differs from acquired curvature that develops later in life.
Congenital curvature is usually stable and longstanding. Many men with congenital curvature do not experience pain, plaque formation or progressive worsening over time.
By contrast, Peyronie’s disease more commonly involves new or changing curvature that develops during adulthood.
| Congenital Curvature | Acquired Curvature |
| Usually present from adolescence | Develops later in life |
| Often stable over time | May worsen gradually |
| Typically no plaque formation | May involve palpable plaque |
| Less commonly painful | Pain may occur during active phase |
A man who has always had a mild downward curve that has remained unchanged for years is in a very different situation from someone developing new curvature, shortening or erection discomfort during midlife.
Even so, assessment may still help clarify whether symptoms are consistent with congenital curvature, Peyronie’s disease or another explanation.
When to Seek Medical Advice for Penile Curvature
Medical assessment may be worth considering if penile curvature is worsening, painful or affecting erections, confidence or sexual activity.
Signs that may justify further evaluation include:
- increasing curvature
- erection pain
- difficulty with intercourse
- shortening or narrowing
- palpable lumps or plaque
- worsening erectile function
- growing anxiety about symptoms
Many men delay seeking help because the condition feels embarrassing or difficult to discuss. Others hope the changes will settle on their own. In practice, some men seek reassurance as much as treatment guidance.
Assessment can help clarify whether changes are consistent with Peyronie’s disease or another cause, whether symptoms appear stable and whether any treatment discussion is appropriate.
If curvature is changing or becoming uncomfortable, speaking with a specialist may help you understand your options. You can also explore broader treatment options for Peyronie’s disease.
Contact us to arrange an assessment for more personalised advice.
Written By:
Charles Turner
Charles Turner is a seasoned Management Consultant with associations with a range of international medical companies including GlaxoSmithKline and Bristol Myers Squibb.
He is responsible for the operational, strategic, and clinical excellence of MansMatters as well as the Peyronie’s disease research and development programmes.
Reviewed by:
Mr. Leon Alamshan
A graduate of St. George’s Medical School, he has developed innovative treatment protocols that have supported improved quality of life for 1000’s of patients worldwide.
