How does “Pain Free” Laser Hair Removal Work?
When treating larger areas such as legs we also use SHR or a modified form of SHR which is basically the delivery of a series of smaller pulses while the head is in continuous movement over the skin in order to generally heat an area of skin that contains hairs. When this is done the hairs absorb the energy more than the surrounding tissue causing them to heat more. In addition, the head cooling is constantly cooling the epidermis which protects it and protects the pain sensors at the base of the epidermis.
Hair growth occurs in 4 stages: 1. early hair growth (early anagen); 2. active hair growth (anagen); 3. regression (catagen), and 4. resting not growing (telogen).
As laser energy is absorbed by the melanin in the growing hair (anagen), one treatment will typically only remove 25% of the total available hairs. Dormant hair follicles do not contain enough melanin to be affected by the laser so multiple treatments are recommended to treat new hairs as their follicles become active.
How do High Peak Power Density Laser improve patient comfort.
Where patients experience pain during a laser treatment this is caused by heat from the laser escaping into the surrounding skin. Older lasers lose as much as 83% of their energy into the skin, but our high peak power density laser can squeeze the same power into a smaller denser beam. The result is that it loses only 25% of its energy. Contact cooling allows the heat caused by excess energy to be drawn out of the skin so there is minimal patient discomfort.