As a medical professional, I can tell you that dehydration can lead to a variety of symptoms, some of which can be severe. While it's not common to *pass out*, or faint, directly from dehydration, it can cause lightheadedness, dizziness, and weakness, which could potentially lead to a fall or a fainting episode if the body's blood pressure drops significantly.

Dehydration occurs when the body loses more fluids than it takes in, which can lead to an imbalance in electrolytes and a decrease in blood volume. This can affect the body's ability to regulate temperature, cause kidney problems, and impair various cognitive functions.

Severe dehydration can lead to a condition called hypovolemic shock, where the body's organs do not receive enough blood to function properly. In such cases, a person may experience symptoms such as cold, clammy skin, rapid heartbeat, low blood pressure, and even loss of consciousness.

It's important to stay hydrated, especially during hot weather, when exercising, or when ill with conditions that cause increased fluid loss, such as vomiting or diarrhea.

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Possible triggers of orthostatic hypotension include: dehydration �C if you're dehydrated, the amount of fluid in your blood will be reduced and your blood pressure will decrease; this makes it harder for your nervous system to stabilise your blood pressure and increases your risk of fainting.read more >>