Hello, Thank you for posting on HCM It’s very difficult to approach conclusive diagnosis unless for proper physical examination, anyways from your description it seems you are suffering from Pityriasis versicolor Pityriasis versicolor is a superficial skin infection caused by a fungus. I would recommend you take short course of oral antifungal drug like fluconazole as advised by your dermatologist. Apply ketoconazole cream twice a day over the white patches regularly. Use shampoo containing ketoconazole and selenium sulfite for rinsing daily. Maintain hygiene. Hope you will get fine soon Thank you Dr Hardik Pitroda