Jock Itch

(Tinea Cruris)

Definition

Jock itch is a fungal infection of the skin on the groin and inner area of the thighs. The medical name for jock itch is tinea cruris.

Causes

Common fungus organisms that grow best in warm, moist areas cause jock itch. Fungus can be transmitted from one person to another by:
  • Direct contact between people
  • Indirect contact, such as sharing towels that are infected with the fungus

Risk Factors

Hot, humid conditions can increase your risk of jock itch. Other risk factors include:
  • Perspiring heavily
  • Being obese
  • Wearing tight clothing
  • Wearing dirty clothing, especially underwear or athletic supporters
  • Infrequently changing underwear
  • Infrequent showering
  • Sharing towels or clothing with other people
  • Using public showers or locker rooms
  • Contact sports such as wrestling
  • Having an immune system disorder
Both men and women can be affected. The condition is more common in men, especially those who perspire heavily.

Symptoms

Jock itch causes a chafed, itchy, and sometimes painful rash around the groin and thigh. The area near the anus may also be affected. The rash is:
  • Usually red, tan, or brown
  • Usually defined clearly at the edges
  • Often slightly scaly
  • May be swollen or have blisters

Diagnosis

You will be asked about your symptoms and medical history. A physical exam will be done. Jock itch can usually be diagnosed based on the appearance and location of the rash.
Typical Location of Rash
Male Front
Copyright © Nucleus Medical Media, Inc.
In some cases, a lab test of the infected skin area may be ordered.

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