@oceanblueeyes ( and another poster, duh me):
I had NO clue pain in the flank area- where our kidneys are- was a sign of a vaccine reaction.
I have a history of kidney stones and severe pyelonephritis w/0 stones, and I almost went to the ER. Because I'm so afraid of hospitals these 13 months and counting, I stayed home, drank lots of fluids and rode it out. Hot soaking baths twice a day helped me a lot.
My shoulder did the exact same thing. I asked my husband to see if he thought it was dislocated. ( He was qualified for the Olympic swim team but NASA called him up to do an internship with them in college and he chose his education over Speedos).
He has a lot of hands on knowledge about shoulder joints that nurses never know.
We know how to do exercises but an ICU nurse is not likely to ever see an adult dislocated shoulder.
He said I didn't have, it was some sort of reaction to the virus in the joint there instead of the muscle. ( Deltoid muscle was a tiny bit sore but I was surprised at the " tiny" soreness. (Part of my vaccine leaked out onto my skin from the tissues- no one's fault as far as I know, just an adverse event).
I'm going to look into these reports we're sharing of a deeper, visceral discomfort and see what I can find and correlate. Apparently, it's not rare, but it seems it should be.
The only thing I can come up with is that the drug is excreted by the kidneys after metabolism, and there may be either an acidic or alkaline pH which causes renal spasms ( a milder form of renal colic) in sensitive people who may have a history of some kidney infections or stones in the past.
Or, in those who have no history of kidney infections or stones in the past.
This is interesting to me- deep organ pain and a large joint ( shoulder joint in total) with stiffness and pain transiently.
I'm glad we are all either OK or getting better. ( I'm fine).