What are the causes of lightheadedness?

Lightheadedness is a feeling of being about to pass out or lose consciousness. Many individuals do not entirely pass out but the sensation is generally uncomfortable. In most cases, some can also experience overall weakness, sweating, and rapid heart rate, inability to stand up or maintain balance. Even though occasional lightheadedness might have no medical cause, regular symptoms can indicate an underlying medical issue that would require proper assessment and care.


Hypoglycemia is a condition in which there is low blood sugar in the body. This can be a natural process or can be caused by excess insulin in the body especially among diabetics. Take note that low blood sugar can be detrimental to the body. If the blood sugar level drops below 50 mg, it can lead to lightheadedness, dizziness and even syncope. This is considered as a risky condition and can progress to diabetic coma and eventually death if not treated. As a first aid measure, a large amount of glucose should be provided in order to restore the blood sugar level and prevent syncope.


A heart attack can cause lightheadedness and dizziness.


Anemia involves a low count of red blood cells and hemoglobin in the blood. This can occur when the body starts to decrease the overall production of red blood cells or hemoglobin or when there is internal bleeding. There are underlying medical issues that can cause anemia or it can occur naturally. Anemia can cause lightheadedness and if not properly diagnosed, can cause an irregular heartbeat and low oxygen levels.

Low blood pressure

When there is low blood pressure, the ability of the body to pump blood in and out of the heart is delayed or slowed. A drop in the blood pressure can occur due to various reasons such as standing up quickly, surgery, pregnancy, loss of blood and even septic shock. The lightheadedness typically vanishes once the blood and oxygen is restored to the brain. Take note that this is considered as a temporary condition that can be treated so that it will return to the normal levels.


An early sign of pregnancy is lightheadedness. The reason for this might be due to the changing levels of hormone in the body. Take note that lightheadedness is quite common during the initial weeks and months of pregnancy. Another possible reason might be the quick and drastic drop in the blood pressure.

Heart attack

A heart attack can cause lightheadedness and dizziness. This life-threatening condition occurs once the heart could not pump blood properly all over the body and eventually progresses into cardiac arrest or ceases to beat. An indication of a heart attack is lightheadedness that is accompanied by chest tightness and pain, severe weakness and irregular heartbeat. This must be treated right away by calling for emergency assistance and seeking emergency care right away.


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