Question 1

can dehydration cause you to feel faint after you ate too fast & to feel lightheaded? how about if your low on a nutrition?

Accepted Answer

Dehydration: Dehydration is common cause of lightheadedness. Other causes are orthostatic hypotension, flu and colds,anxiety and stress, hyperventilation,sudden large bleeding, etc.

Question 2

if you become hypotensive from dehydration with all the symptoms but don't faint, could this cause brain damage?

Accepted Answer

No: As long as you are fully conscious and thinking normally no brain damage. Even fainting due to dehydration is unlikely to cause brain damage in a healthy person. However, getting that dehydrated can cause other problems and should be avoided. If your question is related to athletic activities outdoor activities dehydration should never occurred. Plan ahead to keep hydrated!

Question 3

i took adderall 25mg and my heart rate is higher than usual but not by much but also i sometimes feel dizzy and really week for a brief moment like i'm going to faint. and i know i'm not dehydrated cause my pee is clear. my mom thinks its nothing?

Accepted Answer

: Adderall as well as other medicines like Vyvanse can cause a slight elevation in heart rate because they are stimulants. This may be a side effect of the medicine

Question 4

how long will it take to faint from dehydration?

Accepted Answer

Variable: Fainting generally only occurs in the most severe cases of dehydration.

Question 5

how can i faint from dehydration in hours of drinking?

Accepted Answer

You bet it could: Of course, depends on quantity of booze ingested, but alcohol is both a sedative/tranquilizer, a soporific, and if in high quantities, a toxin.

Question 6

years ago i had bloodwork done & felt very faint/ill. tmrw i'm getting some done due to possible poor circulation & dehydration issues...will i be ok?

Accepted Answer

Vasovagal: Many people, especially young ones, get a vasovagal reflex  (dizziness, sweating, fainting, etc) with certain procedures.  Although this can be very frightening, it is not dangerous and may not recur.  Staying hydrated, having a light snack before a procedure, and laying down during the procedure,  should further reduce the chance of experiencing this again.

Question 7

what causes faintness? not exercising enough?

Accepted Answer

Complex answer: If this has happened more than once you need to see your doctor to determine what is going on and the cause.

Question 8

what could cause sudden faintness, extreme weakness, back out  after smoking a cigarette first thing in the morning?

Accepted Answer

If you are a smoker: It is the cigarettes that are doing this.  It also depends on whether your diet is good or not

Question 9

what might cause faintness, numbness, pain, and lightheaded drowsy and really abnormal feeling only while laying?

Accepted Answer

Many things: Could be anxiety or medical problems. I suggest you see your family physician. Make sure you ask your family members if they have ever had anything like this. Also does this only happen when you are falling off to sleep or coming out of sleep. If so make note of this. Does your heart skip beats? Start taking your BP first sitting then standing am, noon, 6pn, hs with pulse and axial temp. Keep a log.

Question 10

what could cause an intermittent feeling of faintness, followed by a fast heart rate?

Accepted Answer

Hypotension: This sounds like a drop in blood pressure. The body tries to recover from dropping pressure by speeding up heart rate.

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Doctor answers about:

Can dehydration cause fainting

A member asked:

Can dehydration cause you to feel faint after you ate too fast & to feel lightheaded? how about if your low on a nutrition?

A member asked:

If you become hypotensive from dehydration with all the symptoms but don't faint, could this cause brain damage?

A member asked:

I took adderall 25mg and my heart rate is higher than usual but not by much but also i sometimes feel dizzy and really week for a brief moment like i'm going to faint. and i know i'm not dehydrated cause my pee is clear. my mom thinks its nothing?

A member asked:

How long will it take to faint from dehydration?

A member asked:

How can i faint from dehydration in hours of drinking?

A member asked:

Years ago i had bloodwork done & felt very faint/ill. tmrw i'm getting some done due to possible poor circulation & dehydration issues...will i be ok?

A member asked:

What causes faintness? not exercising enough?

A member asked:

What could cause sudden faintness, extreme weakness, back out after smoking a cigarette first thing in the morning?

A member asked:

What might cause faintness, numbness, pain, and lightheaded drowsy and really abnormal feeling only while laying?

A member asked:

What could cause an intermittent feeling of faintness, followed by a fast heart rate?

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