Heavy Sweating in Fibromyalgia and Chronic Fatigue Syndrome

Unexplained and excessive sweating is a common problem with fibromyalgia and chronic fatigue syndrome. Excessive sweating is one of those bizarre symptoms that rarely make it onto symptoms lists or grab the attention of researchers.

That's understandable since we have much bigger problems. Still, heavy sweating can have a major impact on your life.

While healthcare providers and researchers have noted that excessive sweating can be a symptom of these conditions, you may want to talk to your practitioner about complex regional pain syndrome. It has similar symptoms and some research suggests excessive sweating may be more common in that condition.

Close up of sweat on a woman's face
Werayuth Tessrimuang/EyeEm/Getty Images


Several factors could be responsible for our sweating, either on their own or in combination. They include:

The only cause that's "curable" is the medication side effect, and that may not be an attractive option to you if the drug is doing more good than harm.

However, some medications may help control your sweating, so it's worth bringing up with your healthcare provider.

Chronic Fatigue Syndrome Healthcare Provider Discussion Guide

Get our printable guide for your next healthcare provider's appointment to help you ask the right questions.

Doctor Discussion Guide Woman

Living With Excessive Sweating

If you do have to live with this symptom, you may want to keep some items on hand to prevent it from being obvious and embarrassing.

  • Loose powders on your face or other sweaty areas may help absorb sweat before you even know it's there. You can also apply it after drying the sweat off of your skin to keep from being shiny.
  • Oil-absorbing face wipes can keep you from having greasy-looking skin as well. They're generally better than napkins or tissues, which work in a pinch but may be worse for your skin as well as less effective.
  • Dress shields and sweat pads can help absorb sweat before it soaks through your clothing. For especially heavy sweat, a menstrual pad may be your best option.
  • Sweat-absorbing clothes may also be a good option for you. They can be more expensive, though.
  • A hat or ponytail holder can help hide sweat-related hair disasters.

You may find that you need to keep a stash of extra clothing in your car, purse, locker, desk, or another convenient place.

Preventing Excessive Sweating

If your sweating isn't tied to any particular stimulus, you might not be able to keep it from happening. However, if it's tied to heat—and especially our tendency to become overheated—you may find that some of these things reduce the problem.

  • Extra antiperspirant, re-applied a few times during the day, and applied to non-typical places where you tend to sweat a lot may help.
  • Taking cooler baths or showers, or running cool water over your body before you get out, may keep you from getting overheated and sweating more.
  • Especially if you tend to be cold a lot, you may frequently find yourself dressed too warmly for the environment. Dressing in layers gives you more temperature-control options.
  • Choosing cold drinks over hot ones and avoiding hot foods can prevent overheating.

​Once sweating starts, it may be difficult to stop, so you're better off trying to prevent it in the first place.

Dehydration From Excessive Sweating

One important thing about excessive sweating is making sure you stay hydrated. It's important to replace both the water and the electrolytes you sweat out.

Electrolytes are minerals, including:

  • Potassium
  • Calcium
  • Magnesium

If you think you need to replace electrolytes but don't have a sports drink handy, you can get them via supplements or even through food.

It can be hard for us to tell when we're dehydrated because the symptoms can be similar to some we already have. You should make sure to know the symptoms of dehydration.

4 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Xiong L, Leung TWH. Autonomic dysfunction in neurological disordersAging (Albany NY). 2019;11(7):1903–1904. doi:10.18632/aging.101896

  2. Terker AS, Zhang C, McCormick JA, et al. Potassium modulates electrolyte balance and blood pressure through effects on distal cell voltage and chlorideCell Metab. 2015;21(1):39–50. doi:10.1016/j.cmet.2014.12.006

  3. National Institutes of Health. Fluid and electrolyte balance. Medline Plus. 2016.

  4. Ahmed F, Mohammed A. Magnesium: The Forgotten Electrolyte-A Review on HypomagnesemiaMed Sci (Basel). 2019;7(4):56. doi:10.3390/medsci7040056

Additional Reading

By Adrienne Dellwo
Adrienne Dellwo is an experienced journalist who was diagnosed with fibromyalgia and has written extensively on the topic.