Hi, Am 34, 66 Kg. Last week i started getting white patches on my face, near hairline and my beard area. I consulted a dermatologist and she told its because of dandruff and gave me a dandruff shampoo and mometazone fuorate lotion to apply. I'm having dandruff from my schooldays, but this is the first time, am getting patches like this. Please let me know if its because of dandruff and how many days it will take to recover from this.