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Is fainting associated with hypoglycemia and dehydration risk?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hi doctor,

My friend, who is a 38-year-old female, had sudden fainting and tingling in her tongue.

She wants to know what is wrong with her. Is it necessary to visit the hospital?

Please Suggest.

Answered by Dr. G. Deepika

Education:

MBBS

Professional Bio:

Dr. G. Deepika is a Family Physician specializing in Microbiology with twelve years of clinical experience. She completed her MBBS and MD at the Dr. N.T.R University of Health Sciences in 2010 and 2014. She is specialized in providing comprehensive health care for people of all ages. Currently, she is practicing in Romford, Essex, United Kingdom.

This doctor is not available for online consultations on the platform anymore.

Hello,

Welcome to icliniq.com.

Sudden fainting attacks could be because of various reasons. The most common are as follows.

  1. Overactive nerves, may be caused by acts of sneezing, coughing, laughing excessively, sudden pain or fear.
  2. Closed and crowded spaces where there is too little oxygen.
  3. Dehydration.
  4. Diabetes (increase in blood sugar levels).
  5. Hypoglycemia (decreased blood sugar).
  6. In those with heart disease and low blood pressure.
  7. Fainting attacks last only for a few minutes and the recovery is often complete. If this happens very rarely, then it does not require medical attention.

However, it may be a good idea to visit a doctor if the attack is associated with sweating, awareness of fast beating heart, decreased vision and if it lasts for a long time.

If there is a fainting attack, it would be helpful to lay the person in a well ventilated place with the legs elevated more than the level of the head.

I hope this helps you.

Thankyou

Answered by Dr. G. Deepika
Medically reviewed by iCliniq medical review team
Published At December 13, 2016
Reviewed At November 25, 2025

Education:

MBBS

Professional Bio:

Dr. G. Deepika is a Family Physician specializing in Microbiology with twelve years of clinical experience. She completed her MBBS and MD at the Dr. N.T.R University of Health Sciences in 2010 and 2014. She is specialized in providing comprehensive health care for people of all ages. Currently, she is practicing in Romford, Essex, United Kingdom.

This doctor is not available for online consultations on the platform anymore.

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Education:

MBBS

Professional Bio:

Dr. G. Deepika is a Family Physician specializing in Microbiology with twelve years of clinical experience. She completed her MBBS and MD at the Dr. N.T.R University of Health Sciences in 2010 and 2014. She is specialized in providing comprehensive health care for people of all ages. Currently, she is practicing in Romford, Essex, United Kingdom.

This doctor is not available for online consultations on the platform anymore.

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