Fainting after seeing blood is called vasovagal syncope in medical language. When a person sees blood, injury or any sudden stressful situation, the body’s nervous system becomes excessively active. Due to this the heart beat slows down, blood vessels dilate and blood pressure falls. The result of all this is that not enough blood reaches the brain, and the person may feel dizzy and faint. This is more an automatic reaction of the body than fear.

Our brain depends on the constant supply of oxygen and blood. When due to some reason this supply reduces for a few moments, the body starts giving signals, such as feeling lightheaded, darkness before the eyes, nausea, weakness. If proper steps are not taken at that time, the person may become completely unconscious. The body tries to bring the person to the ground so that the brain can get blood again.

Published at : 25 Dec 2025 07:04 AM (IST)

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Many people fainted due to scorching heat or injury, which are killed by water to bring them to their senses. Does this method really work? What to do if someone has fainted? Let us know everything quoting the doctors. & Nbsp;

How effective are water splashes?

The method of splashing water is traditionally used to remove unconsciousness, but scientific evidence regarding its effect is limited. According to a study by the Journal of Emergency Medicine (2025), killing cold water on the face can make the nervous system active, due to which a person suffering from light unconsciousness can be conscious in some cases. This effect is due to cold on the skin and sudden increase in blood circulation. However, it is effective when it is lightly unconscious due to heat or fatigue. In serious cases such as heart failure or head injury does not benefit. & Nbsp;

Neurologist Dr. Rajat Sharma at Max Super Specialty Hospital, Delhi, says that water splashes can only work in mild unconsciousness, but this is not a reliable way. In critical condition it can only waste time. & Nbsp;

Why does unconsciousness come?

There can be many reasons for any person to faint. These include dehydration, low blood pressure, diabetes, heart related problems and head injuries etc. According to Lancet Global Health (2024), dehydration in India in India has 15-20 % cases of unconsciousness. According to Dr. Anita Mehta, Emergency Medical Expert at Lilavati Hospital, Mumbai, it is necessary to know the reason for unconsciousness. If this problem is caused by heat, water can be helpful. However, it can prove to be dangerous in heart or brain related problems.

When should you be killed?

Due to heat, there can be mild fainting when dizziness, in which the nervous system can be active due to light splashes of cold water. This helps in getting conscious. According to the Journal of Neurology (2024), this method is effective only when the person is not completely unconscious and can react. Splash should not be killed very loud or in excess, as it can cause breathing. Dr. Sanjay Gupta, Neurosurgeon of Sir Gangaram Hospital in Delhi, says that if the person is in light consciousness and is hearing your voice, then lightly splash water on the face. If no response is being received then seek emergency help immediately.

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disclaimer: Some information given in the news is based on media reports. Before implementing any suggestion, you must consult the concerned expert.

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