mold behind drywall near plumbing 10

https://wiki-triod.win/index.php/How_Gateway_Water_%26_Mold_Handles_Hidden_Mold_After_a_Plumbing_Leak

There's a musty smell in the bathroom that won't go away, and when I peeked behind the baseboard near the shower pipe, I found black mold spreading on the drywall. The plumbing leak must have been going on for a while behind the wall.