What could cause a bitter or metallic taste every time you put something in your mouth food or liquid and then disappears afterwards until you put something else in?

A persistent bitter or metallic taste when consuming food or liquids can be caused by several factors, including medication side effects, dental issues like gum disease or tooth decay, or underlying health conditions such as acid reflux or infections. Additionally, exposure to certain metals, such as lead or Mercury, can also lead to a metallic taste. If the sensation is frequent and bothersome, it's advisable to consult a healthcare professional for an accurate diagnosis and appropriate treatment.