If that is the only chick, or the last one to hatch: you can take it out and try to stop the bleeding.
If there are other eggs that need to hatch, and the bleeding is just a little bit, I would leave it in the incubator and watch how it does.
If there are other eggs that need to hatch, but the chick is bleeding badly, I would probably open the incubator, grab the chick, and close the incubator again. Have a brooder ready to put the chick in after you deal with the bleeding, rather than trying to stick it back in the incubator.
For how to actually deal with the bleeding, I'm not quite sure-- maybe one of the things people recommend when a dog's toenail is bleeding.