It appeared about eight months ago, very minor but on most days, usually after waking up, sometimes when tired, about 2.5” above the waist, 3” from spine.
I’m in mid 70s, AFib, CAD, recently CHF. Walk at least four miles a day, sometimes fast. Not a hint of back problems or with lifting weights asymmetrically.
Ultrasound and blood creatinine, BUN, eGFR are fine. Strong response to the punch test.