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Some people are born with a poor sense of smell or taste. Upper respiratory infections are blamed for some losses, and injury to the head can also cause smell or taste problems. Loss of smell and taste may result from polyps in the nasal or sinus cavities, hormonal disturbances, or dental problems.
This may be due to a degeneration of the nerve cells which control smell, together with a loss of sensitivity in oneâs taste buds. Men, regardless of age have a lower ability to distinguish between odors. Smoking causes damage to the nasal membranes and reduces one's ability to identify odors.