My tongue has a tingly, kind of metallic taste. I am not on any medications and I have not been sick. I got an ice machine for Christmas and I like to chew ice. I feel sensitive to aerosols like hair sprays or perfumes. I have had this before when I have been on medications. I have had back surgery, my left kidney removed and a bowel resection 3 years ago. I have gained 7 pounds and I am over weight. Any ideas of how to get rid of this?