Cold/sinus/ear infection, certain medications can cause taste loss, nerve damage (temporary and permanent), certain vitamin deficiencies, mouth bacteria and tooth infections are some causes. My husband loss his taste for a few months and was attributed to his MS. However, he also has horrible sinus problems too.
my sister in law was on strong antibotics.got that bad she got thrush. She lost her taste buds for6 months, ended up going on a detox program.If your problem persists, you'll really need to see a doctor.