There are nerves in the tendons, which serve the brain to tell it where you are moving, and how fast, etc.

There are 4 types of sensory nerves in the periphery:

http://faculty.washington.edu/chudler/cv.html

This is why sprains hurt so much and take so long to heal.
If you pull your tendons too hard, pain will result to warn you.

PN can come from a viral infection. And some food poisonings can cause it. A certain type from infected fish:
http://www.emedicinehealth.com/wilde...article_em.htm

Also from poorly cooked chicken= camplyobacter bacteria cause nerve damage.

Histamine excess from histamine foods, or histamine releasing foods:
http://www.histamineintolerance.org....the-food-list/

The histamine symptoms are paresthesias, and difficult to distinguish from real nerve damage (neuropathy).

MSG is also a huge trigger... just eliminating it can give quite a bit of relief. MSG is in almost all processed and restaurant prepared food.

And so you may have more than one event clustering on you at this time to give a rapid response. Sweats like you describe often happen when a person has inflammation or an infection of some type and takes an NSAID like ibuprofen or Aleve. Sweats also come when your blood sugar falls to low levels.

If you decide to use B12, take it on an empty stomach. It stays in your saliva which you swallow and is absorbed in the terminal ilium (intestine)...very little if any is
absorbed in the mouth. If you get tested, you have to stop the B12 several days before the test, because the test will show a false elevation and be rather useless.