Muscle pinch

cingle87

Wondering If anyone can shed some light on something that happening to me, when I do lat raise or any variance of them middle of my traps just below shoulder level every now again I get a pinching sensasion which feels like someone has put a bit of cellotape on the rested muscle and as i raise the dumb bell I get a slight pinch. It doesn't happen every single rep but it does every set and different times, can be start of set or end.

I don't get the feeling with any other exercise I do, including over head press, and face pulls. Its defiantly not coming from my clothes, It doesn't cause me any pain once it happends or do I suffer from any discomfort afterwards.

Is it something I should be worried about or just one of my bodies little quirks?