The Assyrians believed that the main cause of diseases infected was the dirtiness . But who is recently called psychiatric and mind diseases , They thought them caused by demons spirits and jinn . So the methods of treatment varied . They were had knowledge of herbs and medical plants . More than (250) species of herbs and plants were mentioned in the Assyrian king's library (Assur banipal) king was used for remedy purposes , there are another ways One of the most important methods used by Assyrians was their dependence on priests and their dependence on exorcisms by using water , wiping with oil , offering oblations , using fibers , ropes and making magic circles with the incantations and the amulets as well