Facial cupping is another skincare trend we're hearing about right now. If you've been wondering what it is, here is a very brief overview: Some traditional medicine uses cupping as a form of improving blood flow. Traditionally, a glass cup is placed on the body, and a vacuum is formed underneath through a flame that creates a suction effect. Beauty influencers use silicone cups for suction—and it's a mixed bag of pros and cons. User-based evidence suggests there are benefits to facial cupping that include more tone to the face and increased circulation. On the other hand, some users describe bruising and purple marks that take a long time to fade if not applied correctly. Our advice is always to practice caution when trying out a skincare trend at home.