Respected Sir/Madam,
This email is to inform you that, I work as ____________ (designation) and my name is __________ (name).
I beg to inform you that I will not be able to come to work as I am undergoing stress/anxiety. I believe that taking a break from my work will help me feel better and make me stress-free.
This is to request you to kindly issue leave from __/__/_____ (date) till __/__/_____ (date). I will be highly obliged for your kind support. I look forward to hearing back from you at the earliest.
Thanking you,
_________ (Name),
_________ (Employee ID)
_________ (Designation)