Written by Tenley Haraldson.
Reviewed by Cleaning Expert Sean Busch.


You don't have to throw out shirts if they've got embarrassing pit stains! Our simple guide walks you through how to erase armpit discoloration and odors with our 99.96% natural pit stain remover. 

What Causes Yellow Armpit Stains?

pit stains

Understanding the difference between eccrine and apocrine sweat glands can actually help you prevent pit stains from happening in the first place! 

Eccrine vs. Apocrine Sweat Glands 

Covering most of our body, eccrine sweat glands cover most of our body. When our temps rise, they excrete a colorless and odorless fluid to help cool us down. 

Apocrine sweat glands are found around hair follicles (i.e. scalp, armpit, groin). When we're stressed or nervous, they go into overdrive to produce a colorless and odorless fluid. But then that fluid mixes with the bacteria in our hair follicles and aluminum in antiperspirants. The result? A stubborn yellow mixture that clings to fabrics.  

How to Remove Deodorant Stains

what causes armpit stains

Deodorants don’t keep you from sweating, but they do mask/neutralize body odors caused by sweating. If you use deodorant and not antiperspirant, you likely won’t see yellow pit stains on your clothing (although you might spot white residue and sweat stains).

Antiperspirants, on the other hand, contain aluminum compounds which help control odors and sweating by: 

  1. blocking your underarm sweat ducts
  2. inhibiting the bacteria that feed on your sweat.

Since aluminum is the main culprit when it comes to armpit discoloration, you can either choose an aluminum-free deodorant or learn how to stop pit stains from happening in the first place. 

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How to Prevent Armpit Stains 

  • Wear a lightweight undershirt, sweat guards, or dress shields to absorb sweat before it makes its way to your favorite shirt. 
  • Avoid excess caffeine intake since it increases sweat production (by elevating body temperature and anxiety levels).
  • Before popping on your shirt, keep deodorant from transferring by waiting until it's totally dry. 
  • Spray the armpits, collars, and cuffs of machine-washable shirts with Puracy Natural Stain Remover. Throw in the hamper and forget about it until laundry day. 

How to Remove Pit Stains from Shirts in 4 Steps

how to remove yellow armpit stains

If you're removing pit stains from colored shirts or white shirts, the following directions should get even the oldest marks out.

Note: Bleach can make pit stains look even yellower. Using Puracy Natural Stain Remover absolutely brightens white clothes without bleach!

1. Focus on the Dirtiest Places 

It's not just armpits you should check for: Don't forget to keep an eye on "problem areas" like collars and cuffs. 

2. Spray with Puracy Stain Remover 

natural pit stain remover

Fully saturate both sides of the stained area with Puracy Natural Stain Remover and wait at least 15 minutes before laundering. If you’re dealing with a stubborn stain, wait between 8-72 hours (the longer you wait, the better).

Note: For silk, wool, or non-washable fabrics, don’t let this armpit stain remover sit for more than one hour.

3. Agitate the Area 

To remove tough pit stains, agitate the area with a boar’s hair detailing brush, laundry brush, or simply rub the fabric together. This will drive the plant-based enzymes deeper into the fabric’s fibers while loosening stain particles. 

remove yellow armpit stains

4. Launder 

Select a laundry cycle with the warmest water that fabric care instructions allow. We recommend choosing an "Extra Rinse" cycle. Extra-stubborn stains may require two treatments. The plant-based enzymes in our Natural Laundry Detergent help break down sweat stains and its low salt content means that it washes away cleanly and without residue. 

remove pit stains

How Our Natural Pit Stain Remover Works 

pit stain remover

The 6 microscopic, plant-based enzymes in Puracy Natural Stain Remover get deep within  fabric fibers to obliterate pit stains, sweat, body odor, and any other stain-causing substance. No harsh detergents, no potentially harmful chemicals: just a 99.96% natural formula that works incredibly well. 

The Best Natural Stain Remover, Guaranteed 

We believe that we’ve created the best stain remover anywhere – and our customer reviews back us up! In the unlikely event that you don’t absolutely love our Natural Stain Remover, we’ll refund your purchase, no questions or returns necessary.