Every season there are new fads in the spa world (think: oxygen facials and bull testicle hair masks), and 2013 is no exception. See which treatments are hot right now thanks to this fascinating research done by Allure.
Those sour-milk baths Cleopatra took a few thousand years ago might be the first official spa treatment in the history books. Since then, we've gotten a little more savvy — sweat-inducing hammams, hallucination-inducing detox clinics, collagen-stimulation chambers, not to mention the endless varieties of massage. So what's new in the spa world this year?