GarmentCare Guide 
Treating Sweat Stains on Shirts
Underarm stains can involve perspiration, body oils, and deodorant or antiperspirant residue. Their appearance alone does not establish a safe treatment for every shirt. Follow the item's care limits, choose a compatible method, and inspect the fabric after washing. A fresh scent is not proof that visible buildup has cleared or that heated drying is now appropriate.
Give the affected area attention
Tide's collar-and-cuff guide addresses the concentrated soil that can collect where clothing contacts the skin. Pretreatment and an appropriate detergent can give those areas more attention than a routine wash alone. Check the garment's care directions before selecting the wash conditions or working a product into the fabric.
The whole garment still matters
A shirt can include dyes, blends, or finishes that limit the treatment even where the dirty area looks robust. Follow the product's instructions and inspect the result before drying. The useful distinction is between targeting a localized buildup and assuming that the strongest available wash is suitable for every part of the item.
