Is it permissible for me, in Islamic law, to submit passport photos without a headscarf in order to accompany my sick son for treatment abroad, and is this considered a necessity in Islamic law?

Uncovering one's hair is forbidden for a mature woman by scholarly consensus, and many scholars stipulate the covering of the face as well. Contemporary scholars have likened displaying bare images to strangers to this prohibition. Therefore, a means must be found for the son to receive treatment without the mother falling into a religiously prohibited act. If it is possible for his brother, father, or another relative to travel and for his mother to forgo the journey, then that is the safest option. However, if the mother's travel cannot be avoided, and what is required of her cannot be circumvented, then it appears that her travel with her son constitutes a necessity that permits her to present a picture without a head covering, because looking at a picture is less severe than looking at awrah (private parts), and because the necessity of treatment permits a doctor to see and touch a woman.