Imagine you placed a ruler in your back pocket and tucked it under your shirt. Now imagine bending over like our model here (borrowed from a Greg Nuckols article).
If the tip of the ruler finished right about the apex or T12, L1 area, the way it would poke out your shirt is how I can best describe the sensation I feel in that position - obviously, under my skin, not my shirt.
No real pain to speak of, but a slight discomfort that escalates when performing movements like rows and RDLs, or touching my toes. Use to come and go, now its sticking around.
Any ideas?
No idea man, sorry.
Yeah, no worries. More a annoyance than anything.
Cheers.