mold behind drywall near plumbing 42

https://writerhavenx.com/s/7n2v8zjMYqt0P2hMnaSrO

There's a musty smell coming from that bathroom wall, and when I finally cut into the drywall near the plumbing, I found black mold spreading along the backside. The pipe had a slow leak behind the wall for months, and the moisture trapped in the insulation created the perfect dark, damp spot for mold to grow unchecked. Now I'm looking at replacing a big section of drywall and treating the studs before sealing it back up.