You can use a facial beauty device to treat lines, sagging skin, and many other problems. It's tempting to use them every day, but they can be irritating and hard on the skin, and Rie feels that relying on them too much can make the skin tired and dull the skin's own functions, or rather, its sensors. The manufacturer recommends generally two to three times a week. It depends on the device, so it is better to determine the frequency while interacting with the device you purchased and your skin.