I am shocked to learn this today....
"In cases of pre-existing or suspected fissure, use of a lubricating ointment (It is important to note that hemorrhoid
ointment is contraindicated because it constricts small blood vessels,
thus causes a decrease in blood flow, which prevents healing.)" (source : http://en.wikipedia.org/wiki/Anal_fissure)
So people, please stop buying Hemorrhoid cream for fissures !