Fatigue Cause No. 1: Not Enough SleepIt may seem obvious but you could be getting too little sleep. That can negatively affect your concentration and health. Adults should get seven to eight hours every night.
Fix: Make sleep a priority and keep a regular schedule. Ban laptops, cell phones, and PDAs from your bedroom. Still having trouble? Seek help from a doctor. You may have a sleep disorder.
Fatigue Cause No. 2: Sleep ApneaSome people think they’re sleeping enough, but sleep apnea gets in the way. It briefly stops your breathing throughout the night. Each interruption wakes you for a moment, but you may not be aware of it. The result: you’re sleep-deprived despite spending eight hours in bed.
Fix: Lose weight if you’re overweight, quit smoking, and sleep with a CPAP device to help keep airway passages open at night.
Fatigue Cause No. 3: Not Enough FuelEating 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 meals and snacks throughout the day for sustained energy.
Fatigue Cause No. 4: AnemiaAnemia is a leading cause of fatigue in women. Menstrual blood loss can cause an iron deficiency, putting women at risk. Red blood cells (shown here) are needed because they carry oxygen to your tissues and organs.
Fix: For anemia caused by an iron deficiency, taking iron supplements and eating iron-rich foods, such as lean meat, liver, shellfish, beans, and enriched cereal, can help.
There are 16 causes of fatigue in all that are covered in the article, so please read this on online and see if one or more of the listed qualifiers might belong to you.
Causes of Sleeplessness and Fatigue - WebMD