That can be a sign of neurological problems. (that means problems with your brain, just in case you didn't know) You should probably see a doctor.
A metallic taste in your mouth will very likely come and go. The metallic taste most likely comes from blood in the mouth and will heal quickly.
cyanide
From experience, you have some of the symptoms of a seizure. Seizures often leave the victim tasting a metallic taste in their mouth and they black out and become dizzy. I would see your doctor ASAP.
Dysgeusia is the medical term for a metallic taste in the mouth. If this symptom occurs after being bitten by a mamba snake, it could be due to the venom affecting the taste buds and causing this sensation.
Blood tastes metallic :L so it could be that :P
Sometimes blood can taste metallic - it has got Iron after all. But if you have a condition doctors are the ones to ask.
I had a head injury, which caused bleeding in the ears. Went to Ear/Nose doctor and was notified that having a metallic taste in my mouth is normal with a head injury.
Some pregnant woman do experience a metallic taste in their mouth. It is normal, also sometimes your taste buds change.
that or a heart attack...
The lightning bolt releases a huge number of ions into the air, and ozone. Positive ions can combine with your saliva to produce an alkaline solution, which you taste as bitter. Ozone also has a bitter taste and acrid smell.
A doctor will need to diagnose headaches, nosebleeds, and a metallic taste in your mouth. A doctor is the only person who knows your health background.
Usually means some sort of infection.