What is the name for the condition when a person feels dizzy and passes out at the sight of blood?

Thank you for using the Jiskha Homework Help forum. This is "blood phobia:"

http://www.phobia-fear-release.com/blood-phobia.html

P.S. Be sure to check "hemophobia:"

http://www.medterms.com/script/main/art.asp?articlekey=12337