Wow, that’s a pretty severe hit. I became lactose intolerant about 20 years ago but have learned how to counter a lot of the severe effects. As long as it isn’t milk or I haven’t had any other more solid types of dairy I can work around it and not be in the bathroom for 12 hours in pure pain.
I just wish the mom would figure it out, we make special provisions for him when we make team meals at away games but he usually ends up eating the regular stuff when his mom isn’t looking. If he isn’t, then we wouldn’t have to worry about it since no one else is.