These devices are as simple to use as your hairbrush, typically featuring a traditional comb shape that makes it easy to stimulate the scalp using gas-filled neon or argon electrodes. “High-frequency ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Meet the experts: Marisa Garshick, M.D., a leading board-certified dermatologist at Manhattan Dermatology ...