A brief sudden change in a normally constant quantity: a pulse of current; a pulse of radiation. b. Any of a series of intermittent occurrences characterized by a brief sudden change in a quantity.
Some pregnant women experience a metallic taste in their mouth during the early stages of pregnancy, because of the hormone changes. It's also fairly common to crave certain foods, or go off certain foods, and have a heightened sense of smell. Learn more about the signs and symptoms of pregnancy.
Anxiety and Metallic Taste - The Connection. Anxiety does appear to cause a metallic taste in people's mouths. What's interesting, however, is that there doesn't appear to be a medical reason for it. Even during the fight or flight response, there isn't necessarily anything activated in the taste buds that should be creating this metallic taste.