10 Weird Reasons Why Your Deodorant Might Not Be Working

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Finding the right deodorant can be a tricky task: Aluminum or no aluminum? Gel or cream? Normal or clinical strength? Just when we think we've nailed the perfect formula for our picky underarms, a heatwave comes along to disprove everything. 

If you find that your go-to deodorant is not working anymore, or no deodorant works at all, here are common 10 reasons why it probably isn’t doing the job it should.

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You Might Not Be Using the Right Formula
Shopping for deodorants can be ultimately confusing, especially because there are so many brands to choose from. However, New York plastic surgeon Melissa A. Doft, MD, notes that deodorant usually falls into two categories: deodorants and antiperspirants.

Mary Further, founder of Kaia Naturals, a brand specializing in all-natural deodorants, says this difference is critical to understand: "The role of deodorant is to top you from smelling, while the role of antiperspirants is to stop you from sweating."

But which one works better? Dr. Doft states that antiperspirants are usually recommended for those who sweat more, while deodorants are more helpful in neutralizing underarm bacteria and odor.

Dove dermatologist Dr. Alicia Barba adds, "If you’re looking for both odor and wetness protection, I recommend an antiperspirant with aluminum salts [her favorite is a tie between Dove Dry Spray ($6) or Dove Advanced Care ($5)] that help control the flow of seat under the arms, along with deodorant to mask the smell," she says. "If you're looking for odor protection, Dove 0% Aluminum Deodorant ($6) is for you."

You Aren’t Applying Your Formula at Night
Most of us habitually apply our deodorant onto our underarms before heading out for the day, but experts like New York dermatologist Debra Jaliman, MD, find that the best time for deodorant application is at night, right before bed. This allows your underarms to easily absorb your formula, leaving them fresh and dry in the morning. “Antiperspirants work best at night when the skin is dry,” says Dr. Jaliman. “The aluminum-based ingredient can easily get to the sweat gland, to effectively plug the pore. It then can reduce sweating for up to 24 hours.”

Secret Deodorant launched a Night Time Treatment version (it's lavender-scented!) of their coveted Clinical Strength deo for this very reason. "We learned from clinical testing that while Secret Clinical Strength works great when applied in the morning, it works even better when applied at night," says Dr. Maiysha D. Jones, P&G Personal Care Scientific Communications Manager. "Secret Clinical Strength Night Treatment ($8) was created to make the benefit of night time application clear to the consumer. At night, your body temperature is naturally lower, and your sweat rate is too. This allows your antiperspirant to provide a stronger barrier against sweat."

You're Going Through a "Detox" Phase
If you recently made the popular swap from a traditional antiperspirant to an all-natural, aluminum-free deodorant, Furthers says we should allow our bodies 30 days or so to  completely transition out of using antiperspirant. "The detox phase allows your pores to breathe again after they've been plugged every day for several years," she says. "We need to let them breathe and allow what was blocked out to be released." After about a month or so, it should be smooth sailing.

You're Not Using an Antibacterial Soap
Further explains that, believe it or not, sweat isn't what smells—it's the bacteria forming in our underarms that does. "If you manage the bacteria, you'll manage the odor," she says. One way to combat this smell: using an antibacterial soap before applying deodorant, "paying close attention to scrubbing the area to eliminate any bacteria," she says. 

Our personal favorite? The Underarm Bar ($22) by Kaia Naturals, which uses apple cider vinegar, charcoal and sodium chloride to keep bacteria at bay

Your Clothes Might be Making the Situation Worse
Enter another odor-inducing issue we never gave a second thought: our clothing. Further contends that synthetic fibers hold onto odor due to the nature of the weave, but "natural fibers like cotton, linen and bamboo are woven differently and allow odor to move through the fibers instead of trapping it."

Another thing to keep in mind? The fit. "If you're wearing a close-cut rayon blouse on a hot day with natural deodorant on, it's very likely you're going to begin to smell for two reasons," she says. "One: the tight fit will create friction in the underarm and grab onto the moisture, and two, the odor will be trapped in the fabric."

You're Applying on a Damp Underarm
According to Dr. Barba, before applying an antiperspirant or deodorant, we should make sure the underarm is clean and dry. If the area is wet, the moisture can fail to allow your formula to be properly absorbed.

Skin care expert Xiomi Frans-Cuber agrees, adding that sweat and moisture usually prohibit odor and sweat-fighting ingredients from effectively penetrating the skin. “The moisture and sweat on your underarms can completely wash away your formula.”

Stress May Be to Blame
Stress can also a surprising cause of your deodorant fails. Frans-Cuber explains that stress produces hormonal changes, which can ultimately cause an increase in odor-causing bacteria. So, while your deodorant may not exactly be to blame in this case, it’s helpful to be aware of how stress hormones can affect the performance of your deodorant.

“Hormonal changes can lead to an increase in sweat output and create a worse odor than you are probably accustomed to,” says Frans-Cuber. “So in this situation, it may not be the deodorant, but rather just a case of stress hormones.” 

Your Formula May Not Be Strong Enough
While it probably makes sense to find the strongest-smelling deodorant possible, sometimes even the most pleasant-scented products can lack the necessary antibacterial properties to neutralize any existing bacteria. If you find that that your deodorant fades too fast, try talking to doctor about treatments, which can help alleviate the problem.

“If your deodorant does not have any or the necessary antibacterial properties, it could be difficult to kill the odor-producing bacteria and minimize body odor,” explains Beverly Hills, CA, dermatologist Tsippora Shainhouse, MD. “If the odor persists after switching deodorants, see your dermatologist about prescription anti-bacterial treatments that can help reduce the bacterial load.”

You Haven’t Tried a Prescription Formula
Another one of your options includes switching to prescription formulas, which are often stronger than over-the-counter products. These formulas often contain higher concentrations of sweat-busting ingredients and work better for those who sweat a lot.

“For some people, over-the-counter antiperspirants are not strong enough and they require prescriptions,” adds Dr. Jaliman. “These are stronger antiperspirants that work better, as they have higher concentrations of the active ingredient.”

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Botox Is an Option
But, if you are looking for stronger underarm relief, Botox can be valid solution to excessive perspiration. Injected into the sweat glands, Newton, MA, plastic surgeon Joseph A. Russo, MD, says that Botox effectively reduces excessive sweating by deactivating the glands responsible for perspiration. This leaves your underarms drier and free of bacteria.

“Botox can be injected into the sweat glands, which block chemical signals from key nerve endings to effectively deactivate the glands and reduce excessive sweating,” adds Dr. Russo. “It is most commonly used to control perspiration in the underarms.”

You May Have a Larger Condition
Without a doubt, sweating is a normal part of life. However, if you find yourself perspiring more than others, you may have a genetic condition called hyperhidrosis. Some warning signs include an excessive amount of sweat, which can affect the hands, feet and armpits. If you find that you sweat more than the average person, it’s good to make a visit to your doctor to talk about treatment options, as conditions like this usually aren’t treated with antiperspirants and deodorant.

“You may need to take internal medication for your sweating,” says Dr. Jaliman. “For some people, the sweating is so intense that they need to take a pill every day to decrease the swelling. These pills are called anticholinergics.”