This article deals with a very accurate ethnographical description of several kinds of healers from the north mountains of Puebla. On one side, we find the “Tapahtiani” “the one who knows how to cure”; on the other side the “nahualmej” who presents a nahual nature with the possibility of transforming itself into an animal while asleep. Not all “tapahtiani” is a nahual nor all “nahualmej” is “tapahtiani”, the author points out. However, in some cases the “nahualmej” are required as “tapahtiani” in order to cure illnesses considered as “evil”, caused by harmful entities, airs or by “masakame”, a type of witch.