User:Tumpanek/Blood phobia

Blood phobia
Blood Phobia also known as (BII) initial phase increases your Heart Rate (HR) and Blood Pressure (BP). The second phase is the drastic drop in HR (Bradycardia) as well as BP (Hypotension) which leads to cerebral blood flow and fainting.

It is believed that these changes are controlled by the vagus nerve, which affects activity in the chest and abdomen.

Blood-Injection-Injury phobia affects about 4% of the population in the United States.

For a fear to be diagnosed as a phobia, it has to be excessive or unrealistic, and it has to bother the person or interfere with his or her functioning in some important way.

More than half of people with needle phobias and almost three-quarters of people with blood phobias report a history of fainting in the situations they fear (Öst 1992).