The case of properly identifying an anosmic condition is further complicated by the fact that the sense of smell is also confused with the sense of taste. In fact, there are some people who are using their sense of taste in order to compensate for the loss of their sense of smell. This is easily explained by the fact that the sense of taste and the sense of smell resides primarily in the nose. While it is true that sense of smell is all in the nose, the sense of taste does not reside in the nose alone. The nerves at the mouth serves as one of the areas wherein the taste can be distinguished but the senses at the nose are also used to determine the taste of a food just by the aroma that reaches the person's nose.
Aside from this, there are no known causes for a temporary state of anosmia. For those who are suffering the permanent form of anosmia, they are probably caused by damage to their brains. It is either their brain area that deals with the olfactory system has been injured or their olfactory nerves at the nose itself have died permanently. There is also the possibility that the said person is suffering from genetically inclined factors related to anosmia. There are also other kinds of diseases that can be the cause of anosmia or a loss of the sense of smell.