How do you manage your nasolabial folds?

I don't know why my nasolabial folds look so prominent every time I look in the mirror lately.
It used to be just a slight glimpse when I smiled, but lately, it feels like the lines are still there even when I'm not smiling, so it's making me self-conscious for no reason...

I'm looking up all sorts of things online to see if I need to get fillers to fill them in...
How does everyone take care of their nasolabial folds?
Please share any methods that worked for you T_T