Slideshow: Causes of Fatigue and Sleepiness and How to Fight Them Share this: Loading Next Slideshow Jobs That Wreck Your Sleep Fatigue Cause No. 3: Not Enough Fuel Eating too little causes fatigue, but eating the wrong foods can also be a problem. Eating a balanced diet helps keep your blood sugar in a normal range and prevents that sluggish feeling when your blood sugar drops. Fix: Always eat breakfast and try to include protein and complex carbs in every meal. For example, eat eggs with whole-grain toast. Also eat small meals and snacks throughout the day for sustained energy. Previous 3/15 Next Previous 3/15 Next Reviewed by Arefa Cassoobhoy, MD, MPH on February 26, 2014 Sources: This tool does not provide medical advice. See additional information: © 2014 WebMD, LLC. All rights reserved. Slideshow: Causes of Fatigue and Sleepiness and How to Fight The m Share this: ... Read more » 00:34