Leaving the settings to experts, hair follicles must become inflamed around 5-15 mins after they get hit by light beam. More severe inflammation indicates better result. Mild inflammation or no inflammation post treatment indicates that your ultimate result to have permanent hair reduction/removal is ruined forever.
To achieve ultimate maximum reduction results long-term or permanently, laser therapist shouldn’t be too easy with the settings. Why?
Because any light therapies (Diode, laser, IPL and etc.) work with colors, they aren’t effective and lose efficacy in treating light, sparse hair. That is they are less efficient in treating next successive treatment session when hair get reduced.
Clients should never tell any therapists regarding settings. Just change to ones with right skills and experience.
If you tell therapists what settings to use, they can over treat you. Sensation of continuous excruciating pain and burning for over a week or so isn’t fun. (Asking these clients about their experience regarding pain from being over treated by LHR: Hypopigmentation after laser treatment burns (photo))
The settings (wavelengths, pulse with, Hz, fluence, spot sizes) are not only factors. Therapists need to know their machines like how many passes (not the same as Hz), actual power outputs at different settings, clients’ skin colors, hair characteristics and etc. required to build follicles at least above 70-75 degree celsius to destroy follicles but not over treating. Therapists also need to know etc.
Not one setting even from the same machine of the same model is suitable for clients with similar skin colours. Some can’t be treated with higher settings because they get over treated or burnt.
In general, the higher the settings, with multiples passes to go over the same follicles over & over the better the reduction results. But you might still not get much results or get over treated. So leave that to therapists.
Compressing skin with cold/ice pack immediately after the treatment sometimes are required to cool skin down while avoiding ice freeze. Therapists need to know and factor all these and etc.