Blood-injection-injury type phobia

From Wikipedia, the free encyclopedia
Jump to: navigation, search

According to the DSM-IV classification of mental disorders blood-injection-injury type phobias constitute a subtype of specific phobias. It includes fear of blood (hemophobia), injury phobia and fear of receiving an injection (trypanophobia and some other names) or other invasive medical procedures.[1]

A distinctive feature of phobias of this type is their vasovagal manifestation. For most fears (both normal and abnormal) the response to the feared stimulus includes the accelerated heart rate. [1] In the cases of blood-injection-injury phobias a two-phase vasovagal response is observed: first a brief acceleration of heart rate, then its deceleration, bradycardia, and dropped blood pressure. [1] The above may also lead to vasovagal syncope (fainting).[1][2]

These characteristic vasovagal reactions may contribute to the development of a phobia.

The other factors contributing to the development of the blood-injection-injury phobias are the same as for other specific phobias.[1]


  1. ^ a b c d e "Oxford Textbook of Psychopathology" by Theodore Millon, Paul H. Blaney, Roger D. Davis (1999) ISBN 0-19-510307-6, p. 82
  2. ^ "The Merck Manual". Retrieved 2007-05-19.