Sexual Problems in Men

  • Medical Author:
    Kevin C. Zorn, MD, FRCSC, FACS

    Dr. Kevin Zorn is a dual-board-certified (US and Canada), minimally-invasive uro-oncology, fellowship trained urologist at the University of Chicago. His main focus of clinical and scientific interest is in the surgical treatment of renal and prostate cancer. He is also an expert in performing surgery with the DaVinci Surgical Robotic System to manage localized prostate cancer and small renal masses. Dr. Zorn studied medicine and urology at McGill University in Montréal.

  • Medical Editor: William C. Shiel Jr., MD, FACP, FACR
    William C. Shiel Jr., MD, FACP, FACR

    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Take the Impotence (ED) Quiz

What are the risk factors for erectile dysfunction?

The risk factors for erectile dysfunction include:

What causes erectile dysfunction?

There are numerous potential causes of erectile dysfunction.

Neurologic causes include:

Vascular causes include:

Hormonal causes include:

Pharmacological causes include:

Penile dysfunction causes include:

  • Peyronie's disease

Psychiatric causes include:

  • Loss of feeling toward the other person
  • Stress
  • Fear of non-performance

Functional causes include:

  • Bicycling irritating the nerves and tissue of the penis
Medically Reviewed by a Doctor on 3/2/2016

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