So I have had this metallic taste in my mouth for over a month. It started after I went to the dentist last, for a cleaning. I also have been getting headaches in the same place for about three weeks. I'm not sure if the two are related, and I've stopped myself from googling "headache and metallic taste brain tumor". I did read somewhere online that anxiety can cause this awful taste, and headaches as well. I'm wondering if anyone else has experienced this?