Brief Answer:
It may not be of great concern

Detailed Answer:
Dear XXXX,

Thank you for posting your query through this medium and I am pleased to be able to assist you. The metallic taste in your mouth is a symptom known as parageusia which usually is not problematic or may not have a readily identifiable cause. Nonetheless, I understand your concern and you are justified to be worried about any new development in your body given your age. Why this symptom cannot particularly be associated with any specific disease, it can, however, be observed when your taste buds experience an abnormally/disorder, suffering from zinc deficiency, using drugs, suffering from gastric reflux or some other metabolic disease. While having these in mind, it will also be important to relate these with the other seemingly insignificant symptoms as mentioned in your post which could suggest at first glance NOTHING but still it is important to rule out a transient ischemic attack. I will suggest that you can, you should pay a visit to a doctor who can initiate some few screening tests (after complete physical exams) such as fasting blood glucose, full blood count and other necessary tests. This so we could have a more satisfactory picture of your situation and comfortably reassure you. As of now, exercise regularly, take healthy and balanced diet, avoid stress, engage in happy activities and try as much as possible to live a fulfilling life by worrying less about your health. Hope this helps and wish you the best.
Dr. Nsah

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Brief Answer:
Can you look at the mirror and see if any bending/twisting of lips too

Detailed Answer:
Hello,

Can you try to see if there is any bending of lips using your mirror or ask someone to check for you? If that be the case then we may be dealing with a bell's palsy or transient ischemic attack (TIA). A viral infection can be responsible for the bell's palsy (sensation of paralysis or paresthesia of one side of the mouth). This could explain the metallic taste of the mouth as the nerve supply to that side is probably altered. I now feel you may need to visit a doctor given the description you have provided. If it is a gradual onset of stroke, it is better you get early assessment then treatment then wait until anything happens. I suggest you see a neurologist soonest.

Regards
Dr. Nsah

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Brief Answer:
If symmetrical then you require further medical evaluation

Detailed Answer:
Hello XXXX,

Thanks for the feedback. It will be difficult for me to be able to actually assist you with a proper answer to what may be disturbing you without doing a close up medical examination. So I fully support your decision to see a doctor in this scenario. A neurologist will also give you additional input if there is no conclusive statement from your doctor.

Wish you the best and hope you feel much better in the nearest future.

Dr. Nsah

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