Why do some people faint when they see blood?

Most of us know someone who feels absolute terror at the sight of blood .This prevents them from acting effectively against an injury and even makes it difficult for them to go with normality to perform an analytical .Approximately 15% of the population feels apprehension to see blood and 4% suffer authentic phobia In many cases the fear is not pain, since they can be cut and not have that feeling of weakness that leads to fainting, but to the vision of subsequent bleeding.What happens in our body so that we have this reaction? Why do some people faint when they see blood?

Why do some people faint when they see blood?

What happens to these people , according to experts, is that at first they suffer from a situation of stress or anxiety that causes them to have the response activation of sympathetic system When this is activated there is an increase in heart rate, dilated pupils and bronchi, dry mouth and excessive sweating, among other things.This picture occurs in many phobias; what does not happen in any more is that, immediately, this friendly response ceases abruptly .This blackout causes a heart rate drop and causes nausea, dizziness, paleness, narrowing of vision as if it were in a tunnel and sometimes fainting is reached because blood does not reach the brain well.This reaction is called a two-phase response.

The fact of fainting or not depends also on the sensitivity of baroreceptors , which are the pressure receptors we have mainly in the carotid artery and in the aorta.These in turn depend on factors such as age, hypertension, weight, gender, etc.

Why do some people faint when they see blood?

This fear is known as hematophobia and usually start in childhood and adolescence . men are more likely to suffer than women and young people up to 30 years old more than those over this age.Experts have sought an explanation to this res physiological position in the evolution .On the one hand they think that the fainting before the bleeding caused by an injury in an attack, could result in the attacker leaving us alone and forget about us and, on the other, that the decrease in blood pressure caused by fainting, would prevent a bleeding greater while, at the time lying horizontally, would facilitate circulation and the arrival of blood to the brain and therefore recovery.

Why do some people faint when they see blood?

In conclusion, if you are one of those who faint when they see blood, you should not feel self-conscious. It is a more common physical response than you think, it is even believed that in some cases it could be hereditary.To solve it, a psychological treatment is necessary ologico of the phobia that will make it improve significantly and we feel more secure in all those circumstances that involve the vision of blood, such as an extraction, a wound, a small intervention, etc.

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