Sweat Smells Sweet? Here’s What Your Body Is Trying to Tell You

Sweet sweat could be caused by something you ate.
Image Credit: LaylaBird/E+/GettyImages

Nobody likes stinky sweat or putrid-smelling pits. Still, if your perspiration produces a perfumey plume or a saccharine scent, you might be confused. And, perhaps, kind of delighted. A sweet bouquet of sweat is better than bad BO, right?

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Well, probably not. The thing is, your sweat shouldn't smell like a flowery body spray. In fact, a sugary stink is sometimes a sign that something's off in your body, and you need to be checked out by a doctor.

Here, Deena Adimoolam-Gupta, MD, a New York City-based endocrinologist and internist, helps solve this smelly mystery, explaining why your sweat may reek like caramelizing sugar or syrupy waffles (including when it can be dangerous to your health and what you should do about it).

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If you experience a sudden increase in sweating, change in body odor or body odor that smells fruity (or bleach-like), see a doctor immediately, as these can all be red flags of a serious medical issue, according to the Cleveland Clinic.

1. The Smell: Fruity

The Culprit: Diabetic Ketoacidosis

Fruity-scented sweat (or breath) could be a sign of a serious complication of diabetes called diabetic ketoacidosis

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"This occurs in individuals with diabetes, mostly type 1, if blood glucose levels are not managed," Dr. Adimoolam-Gupta says.

Here's why: "When glucose levels are too high, and there's not enough insulin to decrease the blood glucose values, this leads to the formation of ketones [a kind of chemical produced by your liver when it breaks down fats] which have a sweet smell," she explains.

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Other symptoms of diabetic ketoacidosis may include, per the Mayo Clinic:

  • Excessive thirst
  • Frequent urination
  • Nausea and vomiting
  • Stomach pain
  • Weakness or fatigue
  • Shortness of breath
  • Confusion

Fix it:​ If you have any of the above signs of diabetic ketoacidosis, seek medical treatment immediately. This condition must be urgently treated with insulin and intravenous fluids, Dr. Adimoolam-Gupta says. Left unchecked, diabetic ketoacidosis can result in a coma or even death.

Fortunately, you can reduce your risk of ketoacidosis by managing your diabetes (through diet, exercise, medication and daily monitoring of your blood sugar) to ensure your glucose values are in a proper target range, Dr. Adimoolam-Gupta says.

2. The Smell: Burnt Sugar (or Maple Syrup)

The Culprit: Maple Syrup Urine Disease

If your sweat, urine or earwax has an aroma of burnt sugar, you may be dealing with maple syrup urine disease (MSUD).

"This is a rare genetic disorder [usually diagnosed at birth or in early childhood] characterized by deficiency of an enzyme called branched-chain alpha-keto acid dehydrogenase," Dr. Adimoolam-Gupta says. This enzyme helps break down certain amino acids in the body, including leucine, isoleucine and valine, which are found in foods containing protein, according to the Cleveland Clinic.

Because the enzyme is either completely or partially absent, it leads to a buildup of these amino acids, which may produce a possible smell of maple syrup or caramelized sugar, Dr. Adimoolam-Gupta says.

In addition to sweet-scented sweat, urine or earwax, people with MSUD may also experience the following symptoms, per the Cleveland Clinic:

  • Poor feeding, vomiting, loss of appetite, irritability
  • Sluggish/slow/tiredness and weakness
  • Changes in muscle tone — poor muscle tone, muscle tightness/tension
  • Abnormal muscle movements, spasms that cause a backward arching of the head, neck and spine
  • Developmental delay
  • Seizures, convulsions, respiratory failure and coma (as the condition progresses)

Without proper management, people with MSUD can develop a wide range of complications, from intellectual and physical disabilities to even death.

Fix it:​ Treatment for MSUD includes dietary changes (the goal is to consume less branched-chain amino acids), Dr. Adimoolam-Gupta says. In other words, you must carefully monitor your protein intake to limit amounts of leucine, isoleucine and valine.

Some people with MSUD even undergo liver transplants to treat the disease, according to the Cleveland Clinic. That's because a healthy liver can produce the proper enzymes needed to break down the amino acids that accrue in the body and cause problems.

3. The Smell: Maple Syrup

The Culprit: You Ate Fenugreek

When your sweat serves up a wafting scent of waffles and maple syrup, your diet may be the reason. Yep, what you put on your plate can produce a perfumey perspiration.

Here's why: During digestion, certain foods are broken down into aromatic compounds, which can lead to sweet-smelling scents, Dr. Adimoolam-Gupta says.

Case in point: fenugreek. This herb contains a strong aromatic compound called solotone, and when your body breaks it down, your pores may produce a maple syrup smell, Dr. Adimoolam-Gupta says.

Fix it:​ Luckily, there's a simple fix. To stop stinking like the inside of an IHOP, simply limit your intake of fenugreek.

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