Most of the time fatigue can be traced to one or more of your habits or routines, particularly lack of exercise. It's also commonly related to depression. On occasion, fatigue is a symptom of other underlying conditions that require medical treatment.
Use of alcohol or drugs
Many people suffering from insomnia will take a drink before bedtime to help them fall asleep. After an initial stimulating effect, alcohol's sedating effects can reduce the time required to fall asleep.
Excess physical activity
It's well-known that getting zero physical activity can cause you to feel sluggish. But did you know that getting too much exercise can also make you tired? Overtraining happens when you neglect to give yourself enough rest between workouts, especially sessions that you perform at a high intensity.
Lack of sleep
Late nights can take a toll on your energy level. Most adults need between seven and nine hours of sleep each night. If you get into a habit of staying up late, you’re putting yourself at risk for sleep deprivation.
Medications, such as antihistamines, cough medicines
Check drug labels to see if fatigue is a common side effect. If so, talk to your doctor. They might be able to prescribe another drug, or reduce your dosage.
Iron deficiency
It is a condition that can make you feel extremely run-down and exhausted. That’s because iron is what produces red blood cells, and without enough red blood cells your blood can’t supply your organs with the amount of oxygen they need to function properly. Other symptoms of this condition include shortness of breath, heart palpitations, and pallor.
Unhealthy eating habits
If you have a tendency to skip meals, you may not be getting the calories you need to keep your energy up