Hello, Welcome to HCM, As you are having some infection which is not clearing even after three weeks after the application of antifungal cream, as you have consulted your doctor and who has prescribed steroid cream and the oral medicine for your condition. Physical examination is very much must in case of any skin lesions to make proper diagnosis and to take adequate treatment. It is very difficult to suggest that oint nystatin is helpful to you by your history. Definitely this is an excellent antifungal drug but its use in your condition requires physical examination. Thank you.