9 Likely Causes Of Fatigue

If you are one of those people who constantly complain of feeling tired, it could most likely be because you are not getting enough rest. Fatigue can be described as the feeling of being devoid of motivation and energy. 

What Is Fatigue?

In today’s highly pressurized work environment, where multitasking is the norm of the day, most people suffer extreme tiredness or fatigue. Proper rest and sleeping at least seven to eight hours a day will help to refresh you. Fatigue can be classified as physical fatigue or mental fatigue. In physical fatigue a person feels drained of all energy and is unable to complete even the simplest of tasks. If an individual feels constantly tired despite getting proper rest, then it may be a cause for concern. Medical intervention is needed to detect the reason for this extreme physical exhaustion.

What Causes Fatigue?

There are many underlying health conditions which can contribute to a person feeling absolutely drained of energy. Endocrine problems, infectious diseases and even certain type of medications can all result in excessive fatigue. Through this article we will examine nine common factors which are responsible for extreme tiredness or fatigue.


Anemia is one the major factors responsible for causing excessive fatigue particularly in women. Women who have recently give birth or those who suffer from heavy menstrual bleeding are more likely to suffer from anemia related fatigue. In fact most women in their reproductive years suffer from mild to severe anemia and many women complain of a feeling of being drained off all energy during this time.

People who suffer from iron or B12 deficiency, have kidney disease or are deficient in folic acid may also suffer from anemia and in turn from fatigue. In most cases where anemia has been treated successfully by taking iron capsules the fatigue caused by anemia also disappears.


Diabetes related fatigue is fueled by blood sugar imbalance. If a person notices certain symptoms which are normally associated with diabetes along with extreme fatigue, the individual first needs to consult a doctor to determine whether he is diabetic or not. Once the problem of diabetes is brought under control, the feeling of constant lethargy also disappears. Along with medication a person who has been diagnosed with diabetes should get proper sleep and do regular exercise to feel energized once again.


Hypothyroidism is an endocrine disorder wherein the thyroid gland produces abnormally low levels of the thyroid hormone. Women are more likely to suffer from hypothyroidism due to an under active thyroid gland than men. People with undiagnosed thyroid problems often complain of feeling drained of all energy.

The condition of hypothyroidism can interfere with normal sleep patterns. Hypothyroidism can also cause the heart to beat rapidly, can cause a person to have frequent bodily tremors, suffer from bouts of dysentery and even increase the blood pressure. These secondary health problems caused by hypothyroidism can put excessive pressure on the body which can lead to excessive fatigue.

Undiagnosed Urinary Tract Infection

Most people are surprised to learn that Urinary Tract Infection or UTI can lead to excessive fatigue. Women are the ones who suffer from urinary tract infection related fatigue. When bacteria invade the urinary tract as a result of poor hygiene or even after sexual intercourse, it can lead to urinary tract infection. Some women suffer from chronic or recurrent urinary tract infection which causes them to feel constantly tired. Back pain, high fever and fatigue are some of the common symptoms of urinary tract infection. Undiagnosed urinary tract infection can often lead to a feeling of extreme lethargy.

Food Allergies

Food allergies and food intolerances can also cause extreme fatigue. While food is supposed to fuel the bodily activities, when the body develops intolerance to certain types of food, it can lead to a feeling of tiredness. People who have been unable to detect the particular food item which is causing the allergic reaction are more likely to suffer from excessive fatigue.

When the body encounters any particular food item which cause adverse bodily reactions, it fights the allergic inducing food item by releasing cortisone and adrenalin into the blood stream. Over time the regular production of adrenalin and cortisone by the adrenal gland to combat the food allergy can leave the energy levels of the body depleted. Hence eliminating the offending food source from the diet is the best way to fight fatigue caused by food allergy and intolerance.

Caffeine Overload

Caffeine overload caused by consuming too much caffeine can also leave a person feeling tired. Caffeine is a natural stimulant which gives one a quick burst of energy. But like too much of anything is not good, consuming too much caffeine can leave a person feeling drained. Some people are of the belief that caffeine induced fatigue can be overcome by consuming some more caffeinate products. However this will only make matters worse. Women are more likely to suffer from caffeine induced fatigue than men.

Sleep Apnea

Sleep apnea is a sleep disorder where the person may frequently stop breathing during the course of the night. When people temporarily stop breathing during the night they may get up from their sleep with a jerk. This makes it difficult for them to fall asleep again. Once a person falls asleep they are most likely to be woken up again because of the sleep apnea problem. People suffering from sleep apnea suffer from extreme fatigue because they are unable to get good nights sleep. Treating the problem of sleep apnea can help to fight the problem of sleep apnea related fatigue.


Extreme dehydration can also lead to a feeling of fatigue. There is a common misconception that people who have sedentary jobs need not drink water as frequently as say person who are exercising. Whether you are having a sedentary job or doing rigorous exercise, the body needs to be kept hydrated at all times to prevent fatigue.

Heart Ailments

People who suffer from heart diseases are also likely to suffer from fatigue. If you feel tired out after doing some light work or after climbing a flight of stairs, consult your doctor to discover whether you are suffering from some underlying heart condition. Correcting the underlying heart problem can help to fight excessive fatigue.

Photo credit: Librarising.com