How you know you have it: You’ll likely develop a rash along with the itching, though its appearance varies depending on the type of fungus causing it. For instance, if a yeast infection is responsible, you may notice moist, shiny areas of skin on your penis, and possibly some white stuff in the skin folds, along with the red, itchy rash, according to the Mayo Clinic.
Yeast is normally present in small amounts on your skin, but an overgrowth of it can cause an infection. This tends to occur in moist places that don’t get much light, says Jason Reichenberg, M.D., director of dermatology at the University of Texas Austin. So it usually shows up on the sides of your groin, between your genitals and thighs.
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Other fungal infections look a little different: They appear dry and flaky, and usually crop up on your thighs, Dr. Reichenberg says.
How to treat it: Whatever the type of fungus responsible for your itching, an antifungal cream like Lotrimin AF should do the trick. The cream attacks the fungal cells that cause the infection, while leaving your healthy skin cells unscathed.
Pat the region dry before rubbing on the cream. That will help get rid moisture, keeping the fungus from growing and allowing the cream to work better, Dr. Reichenberg says.