common causes for metallic taste
Bleeding gums is the most common cause of a metal taste. Infection in the mouth and gingivitis, or gum disease, are localised causes but there might be an underlying more general cause, such as pregnancy causing hormonal changes, or an illness such as kidney stones, heart failure, diabetes or cancer.
Having a metallic taste in your mouth is medically known as dysgeusia, or parageusia, and is a common condition that most people will experience at some stage in their lives. A metallic taste in the mouth can have a number of simple causes, ranging from bad oral hygiene to a reaction to certain drugs.