Disease Comparison

Overview

Keloid

A keloid is an area of raised, firm scar tissue that grows beyond the boundaries of an original wound. It develops because the body produces excess collagen during the healing process. Keloids can occur after surgery, cuts, burns, piercings, injections, acne, or other skin injuries, and sometimes develop after very minor trauma. They may be itchy, painful, or cosmetically noticeable. Keloids can continue growing over time and may recur after treatment.

Peyronie Disease

Peyronie disease is a condition in which scar tissue, called a plaque, develops inside the penis and can cause curvature or changes in shape during an erection. The plaque may cause pain, shortening, narrowing, or difficulty with sexual activity. Some cases remain stable, while others change over time. The exact cause is not always clear, but injury or repeated minor trauma may contribute in susceptible individuals. Treatment depends on symptoms, degree of curvature, erectile function, and whether the condition is stable or still changing.

Symptoms

Shared

None

Only in Left Disease

Night Terrors

Only in Right Disease

Testicular Pain Vaginal Discharge

Causes

Shared

Genetics

Only in Left Disease

None

Only in Right Disease

None

Diagnosis

Keloid

Keloids are usually diagnosed clinically by examining the scar and reviewing the history of the original injury. Their characteristic raised appearance and growth beyond the boundaries of the original wound often distinguish them from ordinary scars and hypertrophic scars. Biopsy is not routinely necessary but may be considered when the diagnosis is uncertain or another skin condition needs to be excluded. Assessment also considers symptoms such as itching, pain, tenderness, and the likelihood of recurrence.

Peyronie Disease

Peyronie disease is usually diagnosed from the medical history and physical examination. The clinician may ask about when curvature or pain began, whether it is changing, and whether erectile function has changed. Examination may identify the location and extent of plaque. Photographs of an erection or assessment of penile curvature during an induced erection may help determine severity when treatment is being considered. Ultrasound can evaluate plaque and blood flow when additional information is needed.

Prevention

Keloid

Keloids cannot always be prevented in people who are genetically susceptible. When possible, unnecessary skin trauma and cosmetic procedures that create avoidable wounds should be considered carefully in people with a history of keloids. Proper wound care may support normal healing, although it cannot guarantee that a keloid will not develop. People with a strong history of keloids should inform healthcare professionals before planned surgery, piercing, or other procedures that injure the skin.

Peyronie Disease

Peyronie disease cannot reliably be prevented because the exact cause is uncertain. Avoiding unnecessary trauma to the penis and using appropriate care during sexual activity may reduce injury-related risk, although this does not guarantee prevention. People who notice persistent pain, new curvature, or a change in erectile function should seek evaluation rather than repeatedly traumatizing the affected area. Early assessment can help determine whether the condition is changing and whether treatment is appropriate.

Risk Factors

Keloid

Risk factors for keloids include a personal or family history of keloid formation, certain genetic and skin characteristics, and injuries such as surgery, burns, acne, piercings, or injections. Keloids are more common in some populations and are particularly likely to occur during younger adulthood. The location of an injury also matters, with the chest, shoulders, upper back, neck, and ears being common sites. Not every scar in a susceptible person becomes a keloid.

Peyronie Disease

Risk factors for Peyronie disease include increasing age, previous injury to the penis, repeated minor trauma, and a family history of the condition. Certain connective-tissue disorders may also increase susceptibility. Erectile dysfunction can occur alongside Peyronie disease and may complicate symptoms. Not everyone with a possible risk factor develops the condition, and many affected people do not recall a specific injury.