Fatigue, also known as weariness, tiredness, exhaustion, or lethargy, is generally defined as a feeling of lack of energy. Fatigue is not the same as drowsiness, but the desire to sleep may accompany fatigue. Apathy is a feeling of indifference that may accompany fatigue or exist independently.

• Sleep disturbances
• Heart diseases.
• Lung diseases.
• Nutritional disorder.
• Electrolyte disturbances.
• Endocrine disturbances.
• Gastrointestinal disorders.
• Neurological disorders.
• Infectious causes.
• Connective tissue disorders.
• General disorders.
• Gynecologic.
• Exercise disturbances.
• Psychological.
  

• Weakness, lack of energy, tiredness, exhaustion.
• Passing out or feeling as if you are going to pass out.
• Palpitations (feeling your heart beating).
• Dizziness.
• Vertigo.
• Shortness of breath.
  

• Coffee: Caffeine is a known pick-me-up. Studies confirm that caffeine does perk up the brain and get those mental faculties humming.
• Eggs: One of the most important ways you can battle fatigue is to eat a well balanced diet, and eggs are loaded with good things such as protein, iron, vitamin A, folic acid, riboflavin and panthothenic acid.
• Fluids: Drink plenty of water juice, milk or other beverages to keep yourself hydrated. Dehydration can contribute to fatigue.
• Skim milk: Mixing a little carbohydrates can keep you energized. Eating protein with your carbohydrates can block the sleepy feeling and leave you feeling energized.

• Manage your stress. Practice relaxation. Take time out for yourself.
• Find a good time to exercise. Find a partner.
• Check out your medications.
• Eat a good breakfast (whole grain cereal, fruit, milk). Add more fruits and vegetables.
• Avoid too much caffeine habit.
• Give up smoking.
• Have sex with your spouse or partner.
• Get enough sleep. Have a routine. Go to bed at the same time every night.
• Avoid coffee, tea, or caffeinated drinks after 6 pm.
• Drink no alcohol after dinner and decrease the total amount of alcohol (alcohol interferes with sleep patterns).