If you are getting a full nights sleep that is a regular 7 to 8 hours a night and you're still feel fatigued, it's time to look into other causes.  Here are some considerations that might be causing your restless nights.

To help you explore why you might have a simple solution for relieving daily fatigue, here are 8 hidden causes of fatigue:

Anemia Causes Fatigue

The most common symptom of all types of anemia is fatigue since your body is not passing enough oxygen throughout the body.

Signs and Symptoms of Iron Deficiency

Signs and symptoms of iron deficiency include fatigue.

Normal serum iron values are as follows (source):

• Adult males: 75-175 micrograms/dL
• Adult females: 65-165 micrograms/dL
• Children: 50-120 micrograms/dL
• Newborns: 100-250 micrograms/dL.

Underactive thyroid (hypothyroidism) Causes Fatigue

If you are generally feel a little depressed or sluggish, hypothyroidism may be an issue.  Talk with your doctor about blood tests known as T3 and T4  to learn more about your thyroid hormone levels.

Undiagnosed Urinary Tract Infection (UTI) Causes Fatigue

Typically an UTI is associate displays with symptoms of burning or urgency; however in addition to this,  some types of bacteria in the urinary tract could lead to fatigue.

Vitamin B Deficiency Causes Fatigue

B12 deficiency leads to pernicious anemia and can display as irritability, mood swings, dementia, paranoia, confusion, hallucinations, or mania, .  Long term deficiency could be weakness, appetite loss, heart palpitations, dizziness, shortage of breath, and diarrhea

Caffeine Overload Causes Fatigue

Yes, caffeine can provide a quick burst of energy, but doesn't necessary leave your system when it's time for bed. Stop using caffeine for 2 weeks and reintroduce only using it in the morning.  Avoiding cafeine in the afternoon may help with your evening sleep patterns.

Food Intolerances Causes Fatigue

Some doctors believe hidden food intolerances can leave us sluggish and continually feeling exhausted. Consider things that you that might lead to an evening of insomnia.

“Leaky Gut” Syndrome.  

The term leaky gut refer to the g.i. track that has become to permeable and allow food components pass into the blood from through the intestine wall. A low cost and simple way to test foods yourself is to stop suspected food allergies for a week or two and then reintroduce each one a week at a time. As you start to eat the suspected foods, you may notice certain foods take may decrease energy, headaches, bloating or upset stomach or other symptoms.

Sleep Apnea Causes Fatigue

Sleep apnea is a sleep disorder that causes you to stop breathing intermittently and often many times during the night. This isn't the same as snoring.  Losing weight, stop smoking and minor sinus surgery could be solutions.  A sleep studied prescribed by your doctor would be the first step in diagnose.

Undiagnosed Heart Disease Causes Fatigue

Heart disease is the leading cause of death in women. If your fatigue is related to your heart, supplements like Omega Fatty Acids, medications or treatment procedures can usually help correct the problem, reduce the fatigue, and restore your energy.