Laser hair removal is much faster. Electrolysis hair removal has been around for a very long time. It involves a needle entering a single hair root, then sending an electrical current through the root to kill it. This requires a significant amount of time because it treats only one hair at a time, whereas laser hair removal treats a large area (up to the size of a quarter or larger) with each pulse. With laser hair removal, man’s entire back can be treated in 15 minutes or less.