Hi Last 20 days onwards I

Patient: HiLast 20 days onwards I am suffering from skin deseas i.e my face is dry and itching to much and also my face is getting the black color day by day.Last 20 days onwards I am working in office with fully central a.c. what is reason my face is dry and itching pls tel me the solution

Symptoms: Face dry and itching too much

Doctor: