Dear [HoD's Name],

I hope this letter finds you in good health and high spirits. I am writing to request an extension for the submission deadline of my project, which is due on [original submission date]. Unfortunately, I have been facing severe health issues over the past few weeks, which have hindered my ability to complete the project on time.

Explanation of Ill Health:
I have been diagnosed with [specific illness or condition], which has caused me significant physical discomfort and limited my daily activities. As a result, I have been unable to dedicate the necessary time and energy to work on the project. The symptoms of this illness have included [describe symptoms], making it extremely challenging to maintain focus and productivity.

Impact on Project Progress:
Due to my illness, I have experienced a delay in the completion of various project tasks, including research, data collection, and analysis. Additionally, I have been unable to attend classes and consult with my peers and professors, which has further impeded my progress. Despite my best efforts to overcome these obstacles, my health condition has persisted, making it impossible to meet the original deadline.

Request for Deadline Extension:
Considering the circumstances, I kindly request an extension of [number of days or weeks] to submit my project. This additional time will allow me to fully recover from my illness and complete the remaining tasks with the necessary attention to detail and quality. I am confident that with this extension, I will be able to deliver a comprehensive and well-executed project, showcasing my understanding of the subject matter.

Commitment to Timely Submission:
I understand the importance of adhering to deadlines and take full responsibility for the delay caused by my ill health. I assure you that I am fully committed to submitting the project as soon as I have made a complete recovery. I will prioritize my project work and ensure timely submission within the extended deadline.

Conclusion:
I sincerely apologize for any inconvenience caused by my request for an extension. I assure you that I have made every effort to overcome my health challenges and complete the project on time. However, due to the severity of my illness, I believe an extension is the most reasonable solution. I am grateful for your understanding and consideration.

Thank you for your attention to this matter. I look forward to your positive response.

Yours sincerely,
[Your Name]
[Your Student ID]