Slugging is a technique that originated in Korea, and it's really just the act of following your regular nighttime skin-care routine with a thin layer of Vaseline or petroleum-based balm as a way to seal in all the moisture. One of our editors previously tried the technique out and was pleasantly surprised by how dewy her skin looked within a few days of trying it, but just be aware that the results aren't the same for everyone.
"Vaseline doesn't hydrate your skin, but it seals existing moisture into your skin," dermatologist Mariana Vergara, MD, told POPSUGAR. "It protects the skin with inflammation, redness and rosacea, but it cannot be used for everyone, especially if your skin is oily or acne prone."
Basically, if your skin is prone to breaking out, slugging is a trend you might want to skip, as Vaseline has potential to clog the pores and trigger breakouts.