According to WebMD, common causes of groin itch include ringworm and yeast infections, which are caused by fungi that thrive in warm, moist folds of the skin. Symptoms include redness, itching, peeling skin and chafing between the thighs. Ringworm and yeast infections are treatable with antifungal medications.
The Mayo Clinic explains that ringworm of the groin is common in men and is often spread in locker rooms via shared towels and moist clothing. Individuals who sweat excessively or have underlying conditions, such as diabetes, are at a higher risk for developing ringworm.
MedlinePlus explains that yeast infections of the groin are common in obese individuals as well as in individuals with diabetes. Keeping the skin dry with talcum powder as well as keeping blood sugar and weight levels under control help prevent chronic yeast infections.