Why Do I Feel Tired All the Time Even After Sleeping?

Persistent fatigue despite adequate sleep often stems from poor sleep quality rather than sleep quantity. Sleep disorders (e.g., sleep apnea) affect 50 million Americans and may prevent restorative deep sleep phases. A broad spectrum of medical conditions including thyroid disorders, anemia, diabetes, depression, and others can also cause chronic fatigue. Lifestyle factors such as excessive caffeine intake, irregular sleep schedules, high stress levels, and poor-quality diet significantly impact energy levels. Medications like antihistamines, blood pressure drugs, and antidepressants may cause daytime drowsiness as side effects. If you consistently feel tired after 7-9 hours of sleep per night, consult a healthcare provider for proper evaluation and potential sleep-study testing.