Spoiler alert: It’s your neck you’re neglecting. “We tend to focus on our face throughout our lives—until we notice that our neck has begun to sag,” says Jeannette Graf, MD, assistant clinical professor of dermatology at New York’s Mount Sinai Medical Center. Just as the face ages, so does the neck—and it can even fare worse, as the skin on our neck is actually thinner, making the loss of collagen and elasticity that  happens naturally with age even more noticeable.

According to the American Society of Plastic Surgeons, there were nearly 7 million injections of neurotoxin last year, and nearly 2.5 million filler injections, making them the top two most popular minimally invasive cosmetic procedures in the U.S. Thinking about adding to those numbers? Before you make an appointment, read these six important factors to keep in mind before picking up the phone.