Is a married Jewish woman allowed to expose ervah in front of a goyishe man? What about uncovering her hair? Also can a married Jewish woman make a berocha with her hair uncovered?
Answer:
It is permitted for a woman to uncover her hair in front of a non-Jewish man, of course where there is a legitimate reason for doing so (such as going to the hairdresser).
The same will apply for an ervah: There is less severity in exposure in front of a non-Jew, but of course this will only apply to cases of need, such as a doctor, and so on.
For reciting a berachah with uncovered hair, please see here.
Sources:
There is some debate among poskim concerning going to a Jewish hairdresser (for instance), which is due to the man being obligation to avoid any hirhur, and who is liable to transgress the prohibition of velo tasuru acharei ... eineichem.
For a non-Jewish hairdresser, this does not apply, and therefore there would not be any prohibition for a woman to go to a non-Jewish hairdresser.
The same applies to an ervah, provided the circumstances require it, such as a doctor or similar charge.
Having said all of this, it remains a virtue for married ladies to go to a female practitioners, but this preference is deferred by other considerations.