The most frequent culprit behind those puzzling orange or pale patches on towels is benzoyl peroxide, a powerful ingredient widely used to treat acne. It’s found in many well-known products like PanOxyl, Clearasil, Neutrogena, and various prescription creams. While it’s highly effective at clearing skin, it has an unfortunate side effect: it’s a strong oxidizer. When it comes into contact with fabric, it behaves much like bleach.
On darker-colored towels—such as black, navy, deep gray, or charcoal—this chemical reaction often leaves behind orange, yellow, or even pink discoloration. That’s because the darker dyes in the fabric break down first, exposing lighter undertones beneath. A quick way to identify what you’re dealing with is to look at the color of the mark: if the spot is lighter than the towel itself, it’s almost certainly bleaching. If it’s darker, then it’s more likely a traditional stain.
Unfortunately, these marks won’t disappear in the wash. Once the dye has been chemically stripped from the fabric fibers, no amount of detergent, soaking, or scrubbing can bring the original color back. In fact, washing affected towels together with other laundry can sometimes spread lingering residue and damage even more items in the load.
Although benzoyl peroxide is responsible in most cases, it’s not the only possible cause. Rust from aging or corroded pipes can leave reddish-brown stains, especially in areas with hard water. There’s also a bathroom-loving bacterium called Serratia marcescens that can form a pink or orange film on damp surfaces—though this usually wipes away easily with regular cleaning and doesn’t permanently bleach fabric.
To avoid future towel disasters, consider using white towels specifically for your face, thoroughly rinsing your skin before drying off after applying acne treatments, or switching to alternative ingredients like salicylic acid that don’t bleach fabrics. And if your towels are already ruined, they don’t have to go straight in the trash—they can still live on as cleaning cloths, gym towels, or household rags.
