No, you should not use Novacor without consulting a doctor first. Novacor contains a strong corticosteroid alongside antifungal and antibacterial ingredients. Applying strong steroids to the delicate, thin skin of the inner thigh can cause side effects like skin thinning and stretch marks. Furthermore, if your symptoms are caused by a fungal infection (like jock itch), the steroid can temporarily relieve itching but ultimately make the infection worse. The greyish, itchy appearance could be due to chronic fungal infection, eczema, or post-inflammatory changes. Please see a healthcare provider for an accurate diagnosis and a safe, targeted treatment plan.