<human>: Summarize the given text in a few sentences.

Sorry if this is the wrong place, I'm not sure where else to post.  I'm just hoping someone out there might recognize this odd combination of symptoms and who knows, could maybe save someones life ([like the carbon-monoxide post-it note thing!](

So this started almost two months ago that my Step-dad has been experiencing the following symptoms:
-Prominent tingling feeling in left leg
-Regular tingling feeling all over
-Persistent feeling his 'brains are scrambled'
-Severe, constant moth-ball smelling breath

He has been to a couple doctors who ran some basic tests (blood pressure, diabetes, etc) all coming back with good numbers indicating good health. He is going in to get a carotid test this week.

The thing is, he -never- complains about feeling ill (even with broken bones and major dental work not a peep and he never missed a day of work in over a decade but had to take off early on Friday) so if he vocalizes any issues they are extreme and severe.

He is generally very healthy and rarely ever gets sick with the exception of having a serious case of meningitis when he was 5 years old (in the hospital for months). He turns 70 years old this year, he is 6' tall, weighs 195lbs and is a vegetarian.  He also gets a lot of exercise riding his bicycle for over 100 miles every week without fail.

Thanks for any and all help and advice! I'm just hoping someone out there might recognize this odd combination of symptoms and who knows, could maybe save someones life.
<bot>: Step-dad ill, doctors so far say everything checks out fine. Tingling numbness on leg and body, scrambled brain, moth ball breath. What do?