when doing shrugs,deadlifts,anything with that kind of over grip

its only in my left hand in my palm right beneath my thumb

it doesnt hurt but I couldn't finish my shrugs yesterday because of it

its been happening for a couple weeks but more noticeable now

I hae no idea what it could be and I dont know if anyone here could know either because is hard to describe

what should I do?

Ignore it?