No harm. According to information about Core Hertz Energy Comb, the comb is used to promote blood circulation in the scalp, thereby regulating body functions and treating scalp problems. Therefore, the Core Hertz energy comb does not damage hair follicles. Core Hertz energy comb changes produce changes in charge, potential, molecular structure, biochemistry and physiological functions through the nervous and body fluid systems, thereby adjusting the physiological functions of the human body.