Reading Time: <1 minuteI am currently consulting on the theory of hair removal device development at the request of a certain manufacturer. It seems that most people do not understand the difference between hair removal at beauty salons and medical hair removal. Hair removal using lasers is not permitted at beauty salons. In the past, IPL, a type of light hair removal, was used for medical hair removal, but now laser hair removal is the mainstream. Hair removal devices that combine IPL with RF energy have been used in clinical practice for many years and I still prefer to use them. Hair removal devices have been developed on a theoretical basis. The aim is to achieve long-term hair removal effects by destroying the so-called hair center. The center of hair was once called the hair papilla, but it has now become clear that stem cells in the bulge region play a very important role in hair growth and hair development. In other words, hair removal effects cannot be achieved unless the bulge region is thoroughly destroyed with thermal energy. I have summarized the knowledge and papers on the bulge region. bulge area The bulge area is a newly discovered organ in recent research. It sends commands to the hair papilla, which produces hair, and promotes hair growth. The new theory behind medical laser hair removal is that by destroying this bulge area and cutting off the command for hair growth, permanent hair removal can be achieved without destroying the hair matrix cells or hair papilla, which are the seeds of hair. Until now, hair matrix cells (hair roots) have been destroyed, resulting in permanent hair removal.Medical laser hair removalIt was said to have the effect ofHowever, recent research has revealed that it is also important to destroy the bulge region, a hair growth factor that nourishes hair matrix cells.What is the bulge region?alopecia treatmentIt is a type of stem cell (cell that produces cells) that was discovered in 2000-2001 as part of research into hair growth, and produces cells that are important for hair production. Hair growth factors produced in the bulge area become hair matrix cells, which receive nutrients from the hair papilla to produce hair.Medical laser hair removalBecause the aim was to destroy the hair matrix cells, the bulge area was also destroyed at the same time.However, in recent years, hair removal machines that destroy only the bulge area have also appeared.destroy hair matrix cellsMedical laser hair removalThe heat was destroying the dermal papilla through the black hair.Since hair in the growing stage is connected to the dermal papilla, it was possible to thermally destroy the dermal papilla if there was black hair.However, the bulge area is not connected to the hair and always exists in the dermis.In other words, whether or not there are hairs is theoretically irrelevant to destroying the bulge area.However, the mechanism of the currently used hair removal machines that target the bulge area remains the same: they react to the black melanin pigment and apply heat.Therefore, even if the method destroys the bulge area, hair removal is performed in accordance with the hair replacement cycle.   Bulge region related papers 1:https://www.kitasato-u.ac.jp/ktms/kaishi/pdf/KI44-1/KI44-1p001-005.pdf 2:https://www.jstage.jst.go.jp/article/manms/16/3/16_130/_pdf/-char/ja 3:https://www.jstage.jst.go.jp/article/koshohin/42/2/42_420203/_pdf/-char/ja 4:https://www.jstage.jst.go.jp/article/dds/24/2/24_2_109/_pdf/-char/ja XNUMX:https://www.jstage.jst.go.jp/article/jnms/69/6/69_6_564/_pdf/-char/ja XNUMX:https://www.jstage.jst.go.jp/article/jslsm/27/4/27_4_280/_pdf/-char/ja 1: file:///C:/Users/NOBUHI~1204/AppData/Local/Temp/XNUMXA_Abstract.pdf XNUMX:https://www.kose-cosmetology.or.jp/research_report/archives/2016/fullVersion/Cosmetology XNUMX:https://www.tandfonline.com/doi/abs/10.1080/14628839950517039 XNUMX:https://onlinelibrary.wiley.com/doi/abs/10.1111/bjd.12477 XNUMX:https://www.taylorfrancis.com/chapters/edit/10.1201/9781003068952-5/hair-follicle-stem-cells-robert-lavker-tung-tien-sun-john-sundberg   For cosmetic surgery, cosmetic surgery, armpit treatment, hyperhidrosis treatment, petite plastic surgery, hokuro removal, scar treatment, wrinkle, and sagging treatment in Nagoya, please contact Sakae Clinic.