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What Causes Dizziness and Fatigue? 9 Possible Causes

by Gauri Kolhe

Dizziness and fatigue are the most common symptoms showing there is something wrong with your body. Dizziness refers to a condition when you feel the sensation of loosing balance, lightheadedness or as your head is spinning.

Dizziness can lead to serious condition and it could also results as discomfort in your daily life. Dizziness can be explained as disequilibrium, spinning head in still condition.

Technically dizziness is divided in 4 subclasses vertigo, disequilibrium, presyncope and non specific dizziness.

Fatigue is a sudden and gradual feeling of tiredness arises from the prolonged physical activity or when your mind is in extra working mode. It could be a symptom of medical condition. Many of the medical conditions can associated with the dizziness and fatigue.

These symptoms sometime temporary and can fade of with some medications. So if you frequently feel these symptoms, just go to your doctor because untreated dizziness and fatigue can develop the risk of accident while driving or walking on the street.

Here are some possible causes of dizziness and fatigue is listed below.  


Dehydration is the primary and most common cause associated with dizziness and fatigue. Whenever you don’t get enough liquid required to your body, dehydration occurs. This is happen often when you are outside in hot weather or going to a trip where you cannot get to drink enough water.  

Dizziness and fatigue is primary symptom that can be seen after dehydration. Other symptoms are less urination and confusion. Dehydration can treat simply by drinking lots of water and electrolyte solution. In severe case of dehydration you have to go to hospital.

Low blood pressure

Blood pressure is the force that exerted on blood vessel walls by blood as it circulates throughout the body. You can feel dizziness and fatigue when your blood pressure drops down. Other symptoms of low blood pressure are:             

  • Feeling thirsty
  • Fast and shallow breathing nausea
  • Blurred vision
  • Pale, clammy skin
  • Trouble concentrating

Drop in blood pressure may be associated some vitamin deficiencies, heart problem, medications, serious injury, dehydration.

Low blood pressure can be managed by adding more salt to your diet, drinking more water so that blood volume increases.

Low blood sugar level

Human body needs many nutrients like protein, fats, carbohydrate and vitamins that help proper working of the body with providing nutrition. In order to gain energy body needs sugar also called as glucose as it gives the higher calories.

So when body doesn’t get enough sugar, body sugar level drops that causes dizziness, shaking and fainting.

Sometimes low blood sugar is a side effect of having insulin and drugs used for the treatment of diabetes. These drugs design to drop the blood sugar level but in some cases they lower the blood sugar than required that leads dizziness.

Blood level can also drop if you haven’t eating enough when you are working or consuming alcohol without eating anything.

Some other symptoms also indicate the drop in blood sugar level such as:

  • Hunger
  • Sweating
  • Confusion
  • Fast heartbeat
  • Shaking
  • Irritability

If you feel dizziness suddenly than having a fast acting source of carbohydrate can relive low blood sugar level by increasing it. Simply drink a glass of fruit juice or put a hard candy in your mouth.

If you feel hypoglycemia, you may adjust or change your diabetes medicine. You can also mange hyperglycemia simply be eating a smaller portion, frequent meals throughout the day.


Anemia is another cause of dizziness and fatigue. Blood is responsible for providing oxygen to your whole body or you can say each cell. Red blood cells carry oxygen to the cells and organs.

When you have anemia, your body do not have enough red blood cells or these blood cells doesn’t work properly which leads lack f oxygen in the tissue and organs. This lack of oxygen causes dizziness and fatigue. Anemia can also be identifying by other symptoms such as:

  • Pale skin
  • Headache
  • Chest pain
  • Shortness of breath
  • Weakness
  • Fast or uneven heartbeat
  • Cold hands or feet

Possible causes of anemia include Bleeding, nutrient deficiencies, and bone marrow failure.

Vestibular Neuronitis

Vestibular neuronitis is an infection similar to cold or flu that causes inflammation in vestibular nerve in your inner ear. Vestibular nerves are responsible for sending sensory messages to the brain to keep balance.

Inflammation in nerves causes vertigo and dizziness. Vestibular neuronitis have other symptoms like nausea, vomiting, blurred vision, trouble in concentrating.


Dizziness and fatigue may be arises due to migraine. Migraines are nerve racking intense, hammering headaches that last for few hours, in severe cases lasts for few days. In migraine you might also experience nausea, vomiting, sensitivity to light, changes in vision, fatigue and lightheadness.

People having migraine problem may experience dizziness and vertigo even without getting headache and it could be last for few minutes to few hours.

Migraine can be managed by avoiding alcohol, caffeine and dairy products. Antidepressants, NSAID help to mange migraine.


Certain medicines can cause dizziness and fatigue as side effects such as antidepressants (flouxetin, desyrel) antiseizure drugs(gabapentin, pregabalin), blood pressure lowering drugs(ACE inhibitors, beta blockers, diuretics), sleeping pills(diphenhydramine, temazepam, zolpidam, eszopiclone) etc.

Chronic fatigue syndrome

Chronic fatigue syndrome (CFS) is another medical condition associated with dizziness and fatigue even after slept well. Primary symptom of the CFS is dizziness and problem in balance. Some other symptoms of CFS include:

  • Headache
  • Allergies and sensitivities to foods, medicines, or other substances
  • Muscle or joint pain
  • Sleep problems
  • Trouble remembering and concentrating

CFS treatment can be a little difficult as it’s different in each individual. Doctor gives different treatment to each individual according to their symptoms with therapies and medications.

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You can prevent dizziness and fatigue by taking some small steps in daily routine life. Drink plenty of water in whole day around 5-6 glass so that dehydration prevented. Make sure to avoid drinking alcohol. Make sure to lying, seating slowly and get up slowly.