I began having an on and off pain in rib area just under l breast a couple days ago. Monday night, it became more constant and, in addition to it, I started having the same type pain in rib area on lower left back side. I now can t sleep because the pain is worse and seems to be both front and back moving moving toward upper back and armpit...all on left side. I have had shingles ongoing for a year now. Could this possibly be internal shingles, though I have no rash n those areas right now? Also, being on the left side concerns me.