Found mold underneath bed frame

We just discovered mold on the bed frame of one of our bedrooms, should I be worried? It's white, fuzzy mold on the slats underneath the mattress. I am not terribly shocked, because the bedroom in question gets less than ideal airflow, never sees outdoor sunlight, and is probably warmer than it should be.

I am terrified of mold in my home, but this is one of my family member's bedrooms, so I have less control and awareness of it since it isn't my space. I see to it that our house has the best airflow possible, and eliminate any potential causes of mold growth. We haven't had a mold issue, besides some pink looking mold in the bathroom adjacent to this bedroom, which hasn't happened in a while.

I wasn't around this recent mold, but I am still very paranoid because I worry about mold harming me. Nobody has displayed any symptoms of mold exposure.