On the rare occasion (counted 3 so far) I ll get this lightning bolt shock from inside me. I can t explain the direction of it but it seems to hit my left shoulder, left ribs and left hip like some kind of trapped nerve? I m curious as to what could lend to this - I have sustained a Rib Injury many years ago and I m thinking perhaps this has something to do with it?
Rib injury previously may lead to injury to surrounding nerves which accompany ribs so if this nerves get entrapped in between rib edges it may cause shooting pain like your experience try to rule out hypertension by measuring blood pressure more than two times or cervical myelopathy by doing MRI