A scalp massager is a device designed to stimulate the scalp and promote relaxation, stress relief, and improved blood circulation. It typically features a handle with a massage head that can be adjusted to different speeds and intensities. The massage head may have bristles or rollers to provide a gentle or more intense massage. Scalp massagers are often used to relieve tension, promote hair growth, and improve scalp health. They can be electric or manual and are commonly used in hair salons, spas, and for personal use at home.