Is it permissible to remove the hijab for the sake of work and study in France in order to receive necessary medical treatment for a disease that has no cure except there?

The hijab is a religious obligation that a Muslim woman is not permitted to remove except out of a necessity that cannot be averted otherwise. Studying is not a necessity that permits its removal. As for work, if there is no one to support you, and the situation reaches the point of necessity, and you find no other work than that which requires removing the hijab, then you are permitted to take it out of necessity. You should remove the hijab only to the extent required by the necessity and only at the time when its removal is unavoidable. You must put it back on once the necessity ceases to exist. We advise you to seek a righteous husband who will provide for you, relieve you of the burden of seeking employment, and assist you in matters of your religion and worldly life.