When you feel lightheaded, you feel like you could faint at any time. Your brain is not getting the required amount of blood. Deciphering what could be causing you to feel lightheaded can help you fix the problem and prevent the feeling from occurring in the future.
Decrease in Blood Pressure
A very common reason for feeling lightheaded is a quick decrease in your blood pressure. Medications might be the culprit. See the references for a more in-depth look at what causes blood pressure to drop.
Dehydration
Feeling lightheaded can occur if you are dehydrated. It can also occur if you have consumed too much alcohol or coffee or if you have exercised too strenuously in hot temperatures. Be sure to consume lots of water to keep your body well hydrated.
Allergies/Cold
Having a common cold or suffering from allergies can cause you to feel lightheaded. Taking the proper medication for your allergies or for your cold should take care of the lightheaded feeling.
Arrhythmia
Arrhythmia is an abnormal heart rhythm and while not very common, can in fact cause you to feel lightheaded. You can check your own heart rate to determine any abnormality of its rhythm or you can visit your local doctor.
Vertigo
Vertigo can cause you to feel lightheaded and happens when there is a problem with the brain receiving the body's balancing and positioning signals. The more common causes of vertigo include migraines, drop in blood flow in the arteries, and ear injuries, among others.
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