Did you take any medication for the shingles?
It appears that you are suffering from a complication of herpes zoster reactivation - post-herpetic neuralgia.
Numbness may also be accompanied by itching.
Thes numbness fades by itself over time.
However, inclusion of lysine (an essential amino acid) has been known to speed up recovery from this condition.
Do keep us posted on your doubts and progress