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Trauma or injury to the penis and/or the pelvic blood vessels and nerves is another potential factor in the development of erectile dysfunction.  

• Peyronie's disease is a condition associated with erectile dysfunction. With this disease, scar tissue forms inside the penis, and the penis is usually bent or curved during an erection. Injuries to the penis may also result in scar tissue formation as well as penis curvature during an erection.
  
  
• Bicycle riding for long periods has also been implicated as a cause of erectile dysfunction. Some of the newer bicycle seats have been designed to soften pressure on the perineum (the soft area between the anus and the scrotum).

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