mold behind drywall near plumbing

https://blast-wiki.win/index.php/How_We_Found_and_Removed_Mold_Behind_Drywall_Near_Plumbing_in_a_St._Louis_Rental

You walk into the bathroom and notice a faint musty smell. Probably just the humidity, you think. But when you press on the wall near the sink, the drywall feels soft. A tiny patch of black mold is creeping out from behind the trim. You feel a knot in your stomach because you know where there's moisture and drywall, there's usually a hidden problem. The plumbing behind there has a slow, silent leak that's been feeding this mold for months, creating a health hazard and structural damage you're o…