Face rollers are famous tools that people use for skin benefits. According to many studies, it can improve circulation, tighten the skin, and even reduce puffiness around the eyes. Many face rollers are made up of a crystal, like jade or quartz.
In this article, Dr. Nivedita Dadu explains some of the benefits and side effects of gua sha and face rollers on the face.
Ref: Onlymyhealth