The light from a hair removal laser passes through the skin and is absorbed by the hair follicle. The laser energy is absorbed by the hair follicle and is destroyed. Since people have different skin colors, we need to have lasers with a variety of colors of laser light.
In the past some doctors tried to dye the patient hair dark so that more of the laser energy would be absorbed by the hair and thereby the laser would more effectively remove the hair. Unfortunately, it did not work because the dye did not reach the hair follicle.
In the 1450s, women would shave their pubic hair to get rid of lice. And then they would have a pubic hair wig made as a replacement.
The word “Cosmetic” is derived from the Greek word “Kosmos” which means “of this world.”
A tan can absorb some of the energy of laser light and prevent the laser light from reaching the hair follicle. Do not get a tan before laser hair removal.
Neurotoxins are medications developed from the bacteria known as clostridium botulinum. Researchers noticed that people infected with this bacterium had suffered muscle weakness. Dysport and Botox have been developed from this discovery.
The same laser that is used for hair removal, can get rid of toe nail fungus.
The idea behind the CoolSculpt machine started after doctors noticed that children who sucked on popsicles lost the fat in their cheeks without damage to the skin. It is amazing what can develop from a simple observation.
Just before the laser is fired, a jet of frozen air is sent to the skin to protect the skin from the laser energy and to decrease the pain.