However, we can make some educated guesses based on the following:
* Magical Assistance: The magical world likely has potions or charms that could help manage menstrual symptoms. Perhaps there's a simple charm to alleviate cramps, or a potion to regulate flow.
* Practicality: Witches would need to find a way to manage their periods while attending school and participating in magical activities. We can assume there are discreet ways to deal with menstruation, like using absorbent magical fabrics or potions to suppress flow for brief periods.
* Privacy: While the books don't explicitly mention it, it's likely that there are private spaces for girls at Hogwarts to deal with personal hygiene matters.
* Cultural Context: The books don't specify whether or not the magical world has the same taboos and stigma surrounding menstruation that exists in the real world. It's possible that the magical community has a more open and accepting attitude toward menstruation.
Ultimately, the exact details are left up to our imagination. The important takeaway is that the witches at Hogwarts likely have magical tools and practices to manage their periods, just as they do with other aspects of their lives.