Sleep deprivation can severely impair your cognitive function, focus, and physical health, making it dangerous to work, especially in jobs that require attention to detail or physical activity. Missing work due to a lack of sleep is a valid reason, particularly if your safety or the safety of others is at risk. Chronic sleep deprivation can lead to mistakes, accidents, and a decline in overall performance. If you're experiencing severe sleep deprivation, it's important to communicate this with your employer and take time to rest and recover. In the long term, addressing the root causes of your sleep issues, whether it's stress, insomnia, or other factors, is essential for maintaining both your health and productivity. If your job allows, you might discuss flexible hours or remote work options to better accommodate your sleep schedule. Prioritizing rest ensures that you return to work refreshed and able to perform at your best.