Sorry,i live to close to Kansas not to take storm serious. The small nerve
nerve fibers transmit pain signals as well as sensationd of hot and cold.
Damage to small fibers results in burning and acking sensations which are
usauallly persisstent.Your going to recheck

1 Vitiamin deficiencies b12 or vita excessess b6
2 Kidney failure
3. liver failure
4 rheumatoid artrisities
5 adnormal blood (proteins)
6 shingles
6 cancers and treatment
Now you asked about a virus,i don't know,but honest i wouldn't doubt it.
Also if you are overweight it could be Diabetes pre 2 or full blown Diabetes.
I believe on other posts you have also had your Tyroid checked do it again.

When you check the Dr.s make sure you ask for a Neuro Dr. who specialices
in PN of all types and you mube patiet..Sorry again was hiding from storm.
Really s. Manny Blessings Sue