Itching with no discharge, odor or pain usually points to either a mild yeast infection or irritation from soap, tight underwear or sweat, rather than anything serious. Since you have no other symptoms, this is usually safe to try home care for a few days first.
Next Steps
Switch to breathable cotton underwear, avoid scented soaps or wipes in the area, and keep it dry through the day. An over the counter antifungal cream such as clotrimazole often helps if a yeast infection is the cause.
Health Tips
See a gynaecologist if the itching doesn't ease in a week, or if discharge, odor or pain shows up, since you'll then need an examination to confirm the cause.