Most likely, your doctor will prescribe a topical antifungal treatment for you to apply once or twice a day for at least two weeks. If you have athlete's foot, your doctor should treat that as well. Untreated athlete's foot can cause jock itch to return.
Because jock itch commonly comes back, you need to be extra cautious. You can apply powder daily to help keep the area dry. The itching can be alleviated with an over-the-counter treatment such as Sarna lotion. You also should avoid hot baths and tight-fitting clothing. Men should wear boxer shorts rather than briefs.