You don't mention whether you wear makeup or if shampoo has been considered as an irritant. Many women can develop an allergy to cosmetics after years of using them. Nizoral tablets are used to treat fungal infections that are resistant to other medications. Information on this drug says that treatment should be continued until all clinical and laboratory tests indicate that active fungal infection has subsided. If the drug is discontinued too soon, infection will recur.
Minimum treatment ranges from four weeks to six months depending on the type of infection.
If the drug helped, talk to your dermatologist about whether to restart the Nizoral tablets and for how long. Sometimes dermatology problems can be very hard to identify which makes treatment less than sure. Check the calendar.