How likely is it that laser would cause an increase in female facial hair? Is it known what percentage of people have an increase in hair growth. Also are their certain types of people that it is more likely to happen to?
If you’re treating fine hair or sparse hair, it is likely. There have been no studies done and things depend a lot on various variables. Some say that people with darker skin are more susceptible, but that may be also due to the fact that they generally have more facial hair than other women.
But bottom line - there is no point of treating that type of hair in the first place because laser won’t affect it. So all you’d be doing is risking induced growth, for no reason.