http://msn.mediotiempo.com/mas-deportes/noticias/2011/12/21/operan-de-emergencia-al-terrible-morales (spanish) It appears it has to do with a stone in his blister. It says that now it is not certain if he's still gonna be able to fight against Garcia. :| hope he gets well.
Gallstones will have him bedridden for a while. They can't just get the stones outta there, they have to remove the gallbladder... may even end his career. ****.