Cause of jock itch?

Fungal infection. Jock itch (tinea cruris) is caused by a fungal infection. Similar to athlete's foot, cream used to treat this condition are often effective for jock itch as well. Examples include Lamisil (terbinafine) at and lotrimin. See your doctor to confirm the diagnosis.
Tinea cruris. It's a skin infection caused by a fungus. Humidity, sweating, friction perpetuate the symptoms. Treatment at times require a combo of a steroid and antifungals .

Related Questions

What causes jock itch/athletes foot/ringworm/tinea?

Dermatophytes. Jock itch and athletes foot are caused by fungi called dermatophytes. They are normal inhabitants of our skin. If conditions such as moisture and warmth are excessive these dermatophytes grow , thrive and cause fungal infections. These fungal infections can spread from body part to body part and even from person to person. Keep the areas dry and clean. If you get an infection there are otc meds. Read more...