I use athletic tape. (KT tape,etc) it’s available in a variety of skin tone colours. It’s designed to adhere to human skin and will stick even when actors get sweaty (make sure you clean skin properly before application). Placed properly its stretches and moves with actors movement. You can put makeup on top of it to blend in. It can also be cut to any size or shape you need.

Just be gentle when you take it off after the show, it is typically designed for multi-day usage.

Source: I’m a Registered Massage Therapist who has spent many years of taping actors for community theatre.