What Causes Yellow Pit Stains?
If you want to know how to clean embarrassing sweat stains on your favourite outfits, it’s helpful to be aware of what causes those unpleasant patches.
Sweat by itself is actually colourless and odourless. A sweat stain can happen when sweat comes into contact with other chemicals, such as aluminium which is found in some deodorants. The underarm area is often prone to staining because of the apocrine sweat glands, only found in the armpit. Apocrine sweat contains more proteins and fats, which also contribute to staining. Aluminium and apocrine sweat mix with sebum on the skin to create those unpleasant yellow stains on your favourite garments.
One of the biggest factors that causes underarm staining is your choice of deodorant. Not only can it cause the chemical reaction that creates sweat stains, but deodorant itself can also leave behind white stains. This occurs when too much deodorant is applied, and isn’t allowed to dry before putting on clothing.