Not sweating enough during workouts?

Recently, I have barely been sweating during my workouts. I used to sweat a lot and very easily in the past, but now, not even a drop can be created. I breathe very heavily during my workouts but still nothing.

I’m worried if I am not pushing myself hard enough? Or is this simply dehydration (I drink a lot of water before my workouts as well..)? Thank you for reading...