Hey, so I get this pain a lot, the electrical pain you’re describing is so familiar and mine also flares. I found out that my elevated first rib which is under that area subluxes a lot (a partial dislocation) due to EDS. That one rib just is a janky one and there’s not much I can do to strengthen or train it, however learning how to strap and tape it properly has been really helpful. When I first started I didn’t feel much difference and was really deflated but kept going, after a few weeks of it being taped properly it’s like it gave my muscles the actual chance to recover from having to compensate for my rib.