I'm a 48 year old male and until recently I was in excellent health, but I've been suffering from several neurological type symptoms since April 2017, which have generally come and gone with one or two worsening, someone in another forum suggested that I might be suffering from a vitamin B12 deficiency. This is a list of the symptoms I've experienced at one time or another:
(not vertigo, but feeling off balance, no falls yet but definitely getting worse)
Tinnitus (constant since Oct 2017, not loud but gets louder if I stick my jaw out)
Tingling/pins and needles
Altered mood (minor)
Difficulty opening eyelids after sleep
Lower back pain
Upper back/neck pain
Mild sight problems
As far as I can see, all or almost all of these can be caused by a vitamin B12 deficiency, but when I mentioned this to my GP he thought it unlikely as I had a serum test done in April 2017 (just after the symptoms started) and it came back with a level of 660, which is high normal as far as I understand.
I saw a neurologist in December, who diagnosed a functional disorder, but from what I've read, most people with functional disorders don't display all the symptoms that I've had.
A subsequent MRI scan in January showed nothing abnormal, only some neck wear and tear.
In my "googling" I have yet to come across another condition that would explain all these symptoms. Any thoughts or feedback would be most welcome.