If you’ve ever pulled a fresh, soft towel out of the laundry only to see a mysterious orange stain appear, you know how frustrating it can be. The puzzling part is that this stain doesn’t wash out, often showing up even on brand-new towels. Why orange? Why do towels, especially white or light-colored ones, seem particularly prone to this problem?

This guide explores everything about towel orange stains: the chemical, environmental, and practical reasons behind them, why they resist washing, and what steps you can take to prevent or mitigate the problem.