What is this blotchy rash on my face?

Pityriasis Alba. Most commonly it's a condition called pityriasis alba, a flaky dry white patches on face. However, fungal infection or vitiligo may cause the similar "rash", consult your dermatologists.
Can't Say with this. Info. These lesions need to be visualized & a history needs to be obtained in order to make an accurate diagnosis. Sometimes lab testing or biopsy is necessary.