The third situation is when there is an acute irritation of the nerve. The best example of this is “shingles”. This condition arises when the chicken pox virus that we may have been exposed to as a child becomes reactivated when we are feeling run down or are ill in another way. The virus spreads along one particular (or sometimes two or three) nerves and the characteristic rash appears on the skin. Whilst the virus is active, and the nerve irritated, an intense burning, electrical pain can be experienced.
Clearly working out which of these three categories is causing the nerve to misbehave is the starting point for sorting the problem out.