Hi,
Well if this persists, you should see a doctor rule out some neurologic issues. Common causes for a change of taste are:
1)
Vitamin deficiency.
2) Neurological disorders, trauma to the head, surgery of ear.
3) Drugs like
ACE Inhibitor ( Zestril ), certain antibiotics.
4)
Thyroid disorder,
Diabetes.
5) Infection(
Glossitis), ageing, kidney, liver diseases, cancer, tobacco use, smoking.
6) loss or decreased sense of smell.
If you could provide me with more details regarding the symptoms you are facing along with your detailed history, It would help me to help you better.
Till then you can take Multivitamins to improve your taste and to avoid the causative factor.
Hope I have answered your query. Let me know if I can assist you further.