How can you prevent sweat stains and rings?

The first way to reduce sweat stains is to decrease the production of sweat. To do this, in addition to maintaining good hygiene (daily showers, regularly changing clothes, etc.), the simplest solution is to use a deodorant. Often confused with antiperspirant, deodorant works by neutralizing odors through antimicrobial agents. Antiperspirant, on the other hand, blocks sweating. It often contains aluminum salts. Although effective, these are fairly controversial because they are suspected of being carcinogenic, even though studies on this topic are still inconclusive.

If you prefer gentler alternatives, plant-based powders such as cornstarch or diatomaceous earth act as genuine natural blotters, absorbing moisture as soon as it is released, before it migrates into textile fibers. These powders are applied like antiperspirants, in the evening, on clean, dry skin, and they help reduce perspiration the following day, thereby lowering the risk of sweat marks.

Note : These approaches are not exhaustive. Adjusting one's diet, using iontophoresis, or turning to aesthetic medicine options such as botulinum toxin injections are all techniques that can help reduce sweating.

Other strategies can help limit the appearance of underarm stains. Carefully choosing the material of your clothing is a particularly effective approach. Natural fibers, such as cotton, linen, or wool, are highly breathable and have absorptive properties that prevent sweat from immediately beading on the fabric. In contrast, synthetic materials, such as polyester or polyamide, often act as thermal barriers that trap heat and moisture, leading to the rapid formation of sweat rings.

Another tip : If you’re concerned about sweat marks, also choose loose fits with wide sleeves.

Beyond the fabric and the cut, color and patterns can also act as a visual illusion. Some shades are unforgiving when it comes to underarm sweat stains: heather gray, light blue, or pale pink darken instantly on contact with moisture, making even the slightest drop visible. To stay at ease, you can opt for darker shades, such as brown or black. Prints and dense patterns—like stripes, floral designs, or checks—are also helpful allies, because they break up the visual continuity of the fabric and somewhat conceal areas of moisture.

Finally, for high‑stakes days with important meetings or ceremonies, invisible barrier solutions can be integrated into your outfit. Underarm pads, whether adhesive and disposable or built into a technical cotton undergarment similar to menstrual pads, act as a buffer zone. They absorb excess sweat before it reaches your shirt or dress, ensuring that the outer layer remains perfectly dry. This is a simple yet highly effective strategy to protect your most delicate garments, such as silk, which does not tolerate repeated wash cycles well.

If, despite all these precautions, marks still form and remain after washing, it is time to take stronger measures and adopt more targeted strategies. Stubborn yellow stains, particularly visible on whites, often result from a chemical reaction between the aluminum salts in antiperspirants and compounds in sweat. To remove them without damaging your fabrics, here are the reflexes to adopt:

• Use a pre-wash treatment : Never put a stained garment directly into the washing machine. Apply a paste made from baking soda and a little water to the stained area, let it sit for 30 minutes, then gently rub before rinsing. You can also use white vinegar to treat sweat stains. To do this, simply apply it to the discolored areas, let it sit for about 30 minutes, and then put the garment in the washing machine.

• Skip the ironing : Never iron a garment that still shows a ring or halo, even a faint one. The heat of the iron acts like a fixative that “bakes” the stain into the core of the fiber, making it practically permanent.

• Act quickly : The longer you wait, the more the sweat metabolites oxidize. If you cannot start a wash cycle immediately, at least rinse the area with cold water to dilute the salts and proteins.

Halos are not inevitable: certain strategies can help prevent them, and others can remove them.

• CHA J. & al. The etiology, diagnosis, and management of hyperhidrosis: A comprehensive review. Journal of the American Academy of Dermatology (2019).

• BAKER L. B. Physiology of sweat gland function: The roles of sweating and sweat composition in human health. Temperature (2019).

• WOLFE A. S. & al. Physiological mechanisms determining eccrine sweat composition. European Journal of Applied Physiology (2020).

• DARBRE P. D. & al. Personal care products and human health. Academic Press (2023).