Does someone who wishes to play as a page need to explain themselves (as in, "I have an injury," or "I'm 14"), or can anyone choose to participate as a page without needing to disclose a reason?
Each alliance group is allowed to set it's own page rules per PG 89. So it's less of an alliance rules question and more of what policies do individual chapter owners wish to set especially concerning privacy of medical issues. For this question, I'd suggest reaching out to the chapter owner.