Learn how to craft a resignation letter due to health reasonsget tips on what to include and how to write it, plus examples. Discover how to craft a professional resignation letter due to illness.20 sample resignation letters due to health issues to provide you with guidance and assistance for resigning gracefully and professionally. Health Reasons Resignation Letter. Dear Ms. Margie King,. Want to quit your job due to health problems? Know how to write the perfect resignation letter due to health issues, with this guide and multiple samples. "Due to health reasons, I find it necessary to resign to focus on my wellbeing.