Just looking for advice really. My 82 year old mother had a microlarynoscopy in May to remove a benin polyp on her vocal cord. Since then everything tastes metallic, even water. We've been back to ENT, Dentist etc and are not getting anywhere. She also suffers from nausea and constipation. Blood tests have flagged up high calcium and an issue with her parathyroid. Would this be causing the metallic taste too? And could the parathyroid have been damaged during the earlier throat surgery? We're waiting for a Endocrinolgy appointment but that's not until March.