Excuse letters are important as you want to let your teacher or boss know that you are unwell.
Dear Teacher,
My son Ryan Biggs will be missing school for 3 days. We are at the hospital for treatment due to his severe nosebleeds. He has undergone a scan which revealed a bleeding clot up his nasal tract.
Please be advised. He will make up for the lost time at school.
Thank you for your consideration.
Sincerely,
Julia Biggs