This article does not have any sources. (April 2012)
They supposedly happen to other religious people like Saint Francis of Assisi, as well as Jesus. The marks include nail holes in the hands and feet, as if the person had been crucified, but without that having happened.
Those who believe in stigmata say that actual nails were not used, but the holes just appear as a miracle. Those who do not believe say it is not a miracle. They have other ways to explain those stories.[needs to be explained]