When: 3 to 4 months out
What your skin worries are and what results you're hoping for—from lifting to tightening and acne treatment to pigmentation—will help ID when you should start incorporating facials into your routine. (The Mandarin spas also offer a Skin Instant Lab that digitally analyzes your face to help pick the right facial for you.) But as a general rule of thumb, Hirsch suggests people start in-house skin treatments at the three-month mark.
Roberts adds: "If you have not done much with your skin and are looking for an intensive anti-aging treatment, you would need a program of 10 treatments—three treatments a week for the first and second week, two treatments at week three and four. You would then go on a maintenance program of one to two treatments a month." With facials, you'll also have homework to do: A large part of a facial treatment is your at-home routine, she notes. So go ahead—splurge on the fancy products (like these groundbreaking new beauty products for glowing skin). Just be sure to let your derm or therapist help you pick out the best ones for your skin.