Itchy crotch is generally common cause of two aspects: First, skin disease, that is to say, skin eczema is more common, for this kind of skin disease, they do not take medication without authorization. It is best to go to the hospital to see the dermatology department, and then under the guidance of the doctor to use medication. Second, long-term fungal infections, such as ringworm, male scrotum, penis, foreskin and other fungal infections, in this case it is recommended to use antifungal ointment for application, such as ketoconazole cream like commonly used, you can also use potassium permanganate and other solutions, generally more than a week of medication, so that the efficacy of the drug is better, and at the same time, eat less spicy and stimulating food.