The trigeminal nerve is the end of the line causing pain.
The Build Up
Over time the excess energy from the dead spot short circuit is now blasting thru all the bypasses and ending up at the TG nerve which has been releasing the energy thru heat at the sinuses and by growing in size (surface area), but can no longer continue to do so.
By increasing in size, the TG nerve has been adding energy upon itself and maintaining equilibrium. Unfortunately, this can only go on so long until it is physically stopped by the sinuses and skull. As the pressure builds, the cluster victim experiences a full blown TG nerve attack, also known as a cluster headache.
The TG nerve is built around a lot of other nerves also. Many of them react to the extra energy coming off of the TG nerve in negative ways. This can trip auto immune functions and many other internal reactions to false signals.
Sinus issues, allergy symptoms, tooth aches, sensitivity to smell and light are just a few of the additional negative effects.
The Cyclical Part
The electricity can go thru a couple of nerves, hit the TG, and then be released by the TG into another bunch of bypasses which may end up back at the TG in another location. This is quite common and creates a feedback loop or “cluster cycle”.
The electricity follows the PoLR, even if this leads back to itself and then creates another short circuit, causing more jumping, and so on. This may lead back to the original nerve running into the black spot again.
Our muscle memory reacts to the nerves short circuits too. A physical reaction takes place which happens every time. This reaction encourages the cycle to perpetuate. This is why you may have them on a regular schedule each day.