Hello doctor, I’m 27 years old Doctor has prescribed an alt

Patient: Hello doctor,I’m 27 years old. Doctor has prescribed an altris gel for me. But I do not know how to use it.. Should I apply only on scalp? And after applying the gel, should I wash my hairs on daily basis? Can I use any coconut oil for maintenance as usual without washing after applying altris gel?

Symptoms: Graying of hairs