Hi, !
I know two of our former contributors have shared that they sometimes experience flare symptoms on their right sides, so I know you are not the only one that experiences this phenomenon. I honestly can't explain why this happens to some people, but I know it does. Also, this isn't exactly an answer to your question, but I wanted to share one of our contributors own experience with neck pain -- https://lupus.net/living/years-of-chronic-pain. And chest pain can be a sign of costochondritis, so you can see if your symptoms sounds like costochondritis -- https://lupus.net/living/costochondritis-diagnosis. It's not unusual for people with autoimmune conditions to experience bouts of costochondritis.
I hope this information is helpful for you and that you get some relief from the bouts of pain.
Best, Erin, Team Member.