It's not uncommon to sweat during the night. You may sweat a little or a lot, depending on how many blankets you sleep with, how warm your room is, and even what you ate before going to bed.
But if you sweat enough that you regularly wake up with wet pajamas and bedding, there could be an underlying issue.
Night sweats can happen for a number of reasons, and most of them aren't too serious. In some cases, however, regular episodes of night sweating could indicate a potentially serious medical condition.
Read on to learn more about common and less common causes of night sweats, tips to relieve night sweats on your own, and when it may be a good idea to see your healthcare provider.
It's not always possible to determine the cause of night sweats. But other symptoms you experience along with nighttime sweating could help you narrow down an underlying medical cause.
You can experience GERD during the day or at night, and it can sometimes cause night sweats.
Along with night sweats, GERD can cause:
GERD is generally diagnosed if you experience this at least twice a week, or if more severe reflux happens once a week or more.
Anxiety and stress are mental health issues, but they often involve physical symptoms, too. Increased sweating is one common physical sign associated with these conditions.
If your night sweats are happening because of anxiety or stress, you might also:
Addressing the underlying cause of stress and anxiety, generally by working with a therapist, may help improve all of your symptoms.
A range of hormonal issues and hormone disorders can cause excessive nighttime sweating.
These include:
Hormonal conditions can cause a range of symptoms, but some general ones include:
With proper management, many hormonal issues aren't anything to worry about.
Certain drugs can cause night sweats as a side effect. If you've recently started a new medication and are experiencing night sweats, talk to the healthcare provider who prescribed your medication.
Some common drugs known to sometimes cause night sweats include:
If the night sweats have a negative impact on your sleep, your care provider may recommend a different drug or have suggestions to help you manage the side effects.
Sometimes, night sweats may be a symptom of something a bit more serious.
Sleep apnea is a condition that causes you to stop breathing while asleep, usually multiple times in a night.
Obstructive sleep apnea generally occurs when something like throat tissue blocks your airway. You can also develop central sleep apnea when certain health conditions affect the function in your central nervous system.
It's not unusual to have night sweats with sleep apnea. In fact, results of a 2013 study looking at 822 people with untreated obstructive sleep apnea suggest that excessive sweating at night happens three times as often in people with untreated sleep apnea.
If you have sleep apnea, you might also:
Sleep apnea can have serious complications if it goes untreated, such as increased risk for asthma and cardiovascular issues.
It's a good idea to see your healthcare provider for night sweats that happen with other symptoms of sleep apnea.
It's possible for unexplained night sweats to be a symptom of cancer, but this doesn't happen often. If you do have cancer, you'll most likely have other noticeable symptoms, too.
These symptoms may seem to resemble other, less-serious health issues, like the flu.
It's a good idea to see your healthcare provider if you have night sweats and feel fatigued or generally unwell for more than two weeks. It's particularly recommended to see a doctor if you have a fever that doesn't go away and you've recently lost weight without trying, as these can be early signs of cancer.
Types of cancer most often linked to night sweating include Hodgkin's lymphoma, non-Hodgkin's lymphoma, and leukemia.
These cancers also usually involve the following symptoms:
Some serious infections can also cause night sweats, including:
But as with cancer, infections also tend to cause other noticeable symptoms as well. These include:
If the above symptoms last for more than a few days or suddenly get worse, call your healthcare provider right away. It's also a good idea to seek medical care if your fever rises abruptly or won't go down.
In rare cases, night sweats can occur as a symptom of certain neurological issues, including:
Neurological issues can involve many symptoms, but some common early indicators might include:
If you don't have other symptoms that might indicate something more concerning, try these tips to relieve night sweats:
If you only get night sweats occasionally and they don't significantly affect your sleep quality, you probably don't need to be too concerned. Still, you may want to mention them the next time you see your doctor.
But if you're having trouble sleeping, regularly wake up soaked in sweat, or have other symptoms that concern you, it's best to check in with your healthcare provider.
Some potentially serious symptoms to watch for include:
Your healthcare provider can help you get to the bottom of your night sweats and, if needed, come up with a treatment plan.