I would contact Housing and request that they test for mold and/or move the student to a different dorm. It is a serious issue. A friend’s daughter needed sinus surgery and has had health (mostly respiratory) issues for over a year due to living with dorm room mold. In an ideal world, 18 year old adults would deal with this on their own. However, in the real world students are often given the brush-off by university administration. I know my friend’s daughter got absolutely nowhere. It took a lot of persistence on the part of her parents to get her moved. For something like this, I see absolutely no problem with a parent getting involved.