I have it, but mine arnt grey, there just white dots, and i have what looks like dry skin on it. It tends to spread, if she has alot of it, i sugest taking her to a dermatologist and getting her some medication. Its a really simple test to see if she has it, the Dr will take a razerblade and just scrape off the dry skin or he called them scales, (i dont like thinking i have scales though lol) its really easy and doesnt hurt at all. There is also a cream you can put on it, Ill have to go find my paper from the dr and i can send you the name of the cream when i find it.
Also, I was tould not to wash with soap, and to not take a shower or bath for longer than 5 min. There is a special soap you can buy also.
Ill let ya know when i find the papers i got from the Dr's, hope i helped you.
Antifungal creams and foam solutions are available with or without a prescription. These products can be applied to the body or face once or twice a day for 2 weeks.
Ketoconazole (Nizoral), available with a prescription.
Clotrimazole (such as Lotrimin), available with or without a prescription in different strengths.
Terbinafine (Lamisil), available with or without a prescription in different strengths.
Butenafine (Mentax), available with a prescription.
Naftifine (Naftin), available with a prescription. Naftifine also comes in a gel.
Ciclopirox olamine (Loprox), available with a prescription as a cream, gel, or lotion. However, it is fairly expensive, and you will need to apply large amounts to affected areas.
Terbinafine (Lamisil) 1% solution can also be used to treat tinea versicolor. Terbinafine is available with a prescription and comes in a pump spray.
Antifungal shampoo containing selenium sulfide should be applied once a day over most of your body from the ears to the knees, including the back. It can be rinsed off after 10 minutes. The shampoo should be used daily for 7 to 14 days or longer.
An antifungal shampoo containing ketoconazole (Nizoral) is available with or without a prescription in different strengths. Nonprescription shampoos may be less effective than prescription shampoos.
An antifungal shampoo containing the medication selenium sulfide 2.5% is available by prescription. Selenium sulfide is also available in nonprescription antifungal shampoos (such as Selsun Blue or Head and Shoulders). However, nonprescription shampoos may be less effective since they contain only 1% selenium sulfide. Selenium sulfide may irritate your skin