Persistent tiredness is rarely about one thing. Most chronic fatigue cases come down to a stack of small, fixable issues.
You're not sleeping enough — or well enough
Adults need 7–9 hours. Tracking your sleep for a week often reveals the gap.
Hidden sleep apnea
Loud snoring plus daytime sleepiness warrants a sleep study.
Low iron or vitamin D
Two of the most common deficiencies behind chronic fatigue. A simple blood panel can rule them in or out.
Dehydration and over-caffeination
Caffeine after 2 p.m. and inadequate water both impair next-day energy.
Final word
Sleep is the foundation of every other health metric. Pick one habit from this guide and apply it for the next seven nights — small, consistent changes compound quickly.