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what are night sweats

Night sweats are episodes of excessive sweating that happen during sleep, strong enough to soak your pajamas and bedding even when your bedroom is cool and comfortable.

Quick Scoop: What Are Night Sweats?

Night sweats aren’t just “getting a bit warm under the covers.” They refer to repeated, often drenching sweats at night that can wake you up and make your clothes or sheets soaked. It’s considered night sweats only if the environment isn’t too hot (normal heat, heavy blankets, or warm rooms don’t count).

People often describe them like this:

  • Waking up with damp or soaked pajamas or sheets.
  • Needing to change clothes or bedding during the night.
  • Feeling suddenly very hot, then sweaty, then chilled afterward.
  • Sleep being disturbed, feeling tired the next day.

What Causes Night Sweats?

Night sweats are a symptom, not a disease. They can be caused by many different things, from harmless to serious.

Common causes include:

  • Hormone changes
    • Menopause “hot flushes”/hot flashes.
* Perimenopause (years leading up to menopause).
* PMS/PMDD hormone shifts before a period.
* Thyroid problems (overactive thyroid).
  • Infections and illness
    • Fevers from infections (like viral or bacterial illnesses).
* Some more serious infections (for example, long-standing infections) can cause drenching night sweats.
  • Medications and substances
    • Certain antidepressants, steroids, and painkillers.
* Alcohol and some drugs.
  • Metabolic and other conditions
    • Low blood sugar (especially in people on diabetes medications).
* A condition called hyperhidrosis, where you just sweat too much in general.
* Some hormone disorders, neurologic conditions, and some cancers can list night sweats among their symptoms.

In many people, especially if mild and infrequent, night sweats are not linked to a dangerous cause and can be related to stress, anxiety, or temporary illness.

When Night Sweats Are More Concerning

Night sweats deserve more urgent medical attention if they come with:

  • Unintentional weight loss.
  • Long-lasting or high fevers.
  • Persistent cough, chest pain, or trouble breathing.
  • Ongoing diarrhea or pain in a specific area.
  • Very frequent, drenching episodes that keep happening over weeks.

In these situations, they can sometimes be a clue to a more serious underlying problem, so a health professional should check them out.

Simple Things You Can Try (Not a Diagnosis)

These are general comfort tips people use while they’re figuring out the cause with a doctor:

  • Keep the bedroom cool, use light breathable bedding and sleepwear.
  • Limit alcohol, spicy food, and very hot drinks close to bedtime.
  • Stay hydrated during the day so sweating doesn’t dehydrate you more.
  • Track when the sweats happen, what you ate/drank, your menstrual cycle, and any new medications, and share that log with your doctor.

These steps can ease symptoms, but they do not replace medical evaluation if night sweats are severe or persistent.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.