Respected Sir/Madam,
I am ____________ (your name) working in ________ (department) as ______________ (designation. I beg to inform that I am suffering from neck pain for the last _________ (number of days) days and the pain is getting severe with the passing time.
I write this email with the utmost respect to request you for sanctioning sick leave under my name from __/__/____ (date) till __/__/____ (date) so that I will be able to take rest and appropriate care of myself.
I shall be highly obliged if the same could be approved at the earliest.
Yours sincerely,
___________ (Name),
___________ (Designation),
___________ (Employee ID number)