Full body hair removal is somewhat of a misnomer, because you don't treat the eyebrows, ears, nose, etc. but you focus on the main areas like the legs, bikini, back, chest, arms, and neck/beard. Laser hair removal works by targeting specific hair follicles in specific growth phases. This is why it requires multiple treatments. Each hair is not in the same growth phase at the same time, and not all hairs on the body grow at the same rate. So sometimes you will skip certain areas during a treatment. Like the legs don't need to be treated every 3-4 weeks like other areas do. Laser hair removal usually requires between 6-8 treatments for the best results and if you are treating all of those areas and chose to go to an experienced office, you will probably spend several thousand dollars. Once a hair follicle is treated and destroyed, it doesn't come back and isn't capable of growing a hair ever again. Over time though your body will develop some new hair follicles - this is what makes us human - so you will need to do a maintenance treatment every now and then to target new hairs. Maybe a treatment every 6 months or so. "This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion. Seek in-person treatment with a trained medical professional for appropriate care."