I have had this metal taste in my mouth for a year, is there any cure for this?

Taking medication?: Some medications can cause metalic taste. Sometimes blood from bleeding gums can cause metalic taste as well.

Taste: Best to get evaluated by your dentist to determine the source

Dysgeusia: is a change in your sense of taste and a metallic taste due to a variety of causes; from anxiety to dental problems (failure of a dental crown), medications and treatments.