What is the number one cause of night sweats?

Author: Pierre Oberbrunner  |  Last update: Wednesday, June 10, 2026

“I see patients about night sweating all the time,” says Aris Iatridis, M.D., a sleep medicine specialist and pulmonologist at Piedmont. “The most common cause of night sweats is menopause, but other illnesses and medications can also play a role.”

What illnesses cause night sweats?

  • Alcohol use disorder.
  • Anxiety disorders.
  • Autoimmune disorders.
  • Autonomic neuropathy (damage to your autonomic nerves)
  • Brucellosis (a bacterial infection)
  • Carcinoid tumors (a type of neuroendocrine tumor)
  • Drug addiction (substance use disorder)
  • Endocarditis (an infection of the inner lining of the heart)

Why are night sweats a red flag?

Changes in hormones due to other conditions, like pregnancy or a thyroid disorder, may also cause night sweats. Medical issues: A variety of disorders can have night sweats as a symptom, including types of cancer, spinal cord injury, chronic fatigue syndrome, and mercury poisoning.

What deficiency causes night sweats?

Your memory problems, mood swings or night-time sweating could be due to deficiency of Vitamin B12.

Why would you wake up drenched in sweat?

Causes of night sweats

medicines, such as some antidepressants, steroids and painkillers. low blood sugar (hypoglycaemia) alcohol or drug use. a harmless condition called hyperhidrosis that makes you sweat too much all the time.

Doctor explains SWEATING AT NIGHT | Causes, treatment and when to see your doctor.

Do night sweats mean something is wrong?

In some cases, night sweats are a sign of a medical condition. In others, they may be caused by a medicine that you are taking. The most common causes of night sweats are related to hormonal changes in females, such as occur with: menopause or perimenopause.

Why do I sweat in my sleep in a cold room?

Night sweats may have an underlying cause, such as hormonal changes like menopause or a thyroid disorder, an infection like the flu or COVID-19, gastrointestinal disorders like GERD (gastroesophageal reflux disease), stress, or sleep apnea.

How do you feel if your B12 is low?

Symptoms may include:
  • Weak muscles.
  • Numb or tingling feeling in hands and feet.
  • Trouble walking.
  • Nausea.
  • Decreased appetite.
  • Weight loss.
  • Irritability.
  • Lack of energy or tiring easily (fatigue)

What drugs cause you to sweat profusely?

Certain medications can cause sweating as a side effect, including but not limited to:
  • Albuterol (Proventil®).
  • Bupropion (Wellbutrin®).
  • Hydrocodone.
  • Insulin (Humulin® R, Novolin® R).
  • Levothyroxine.
  • Lisinopril.
  • Naproxen (Aleve®).
  • Omeprazole (Prilosec®).

When should night sweats be alarming?

If your night sweats occur on a regular basis, interrupt your sleep, or are accompanied by a fever or other symptoms, such as unexplained weight loss, then you should schedule an appointment with your physician.

Which cancers cause night sweats?

Drenching night sweats that require changing clothes are more concerning than mild night sweats. Leukemia and lymphoma are among the cancers associated with night sweats. Those associated with leukemia usually occur in conjunction with symptoms such as fatigue, weight loss, or excessive bruising.

What tests should be done for night sweats?

If the history and physical examination are not diagnostic, initial tests should include a complete blood count, purified protein derivative or quantiferon assay for tuberculosis, thyroid-stimulating hormone, HIV, C-reactive protein level, and chest radiography.

What nobody told you about night sweats?

The most common causes of night sweats

Besides menopause, night sweats can be caused by: Acute infections, such as tuberculosis or endocarditis (inflammation of the heart valves) Anxiety. Cancers, such as leukemia or lymphoma.

How long is too long for night sweats?

An individual should be concerned about night sweats when they have been ongoing for two weeks or longer along with the below conditions: Unintentional weight loss. Fevers or chills. Body aches and joint pain.

Why am I sweating one minute and freezing the next?

They're called diaphoresis and they have many causes, such as a fight-or-flight response, low blood sugar, or life-threatening events like a heart attack or shock. Mechanisms that cause diaphoresis include loss of blood, low blood pressure, and adrenaline directly stimulating the sweat glands.

What organ is affected by B12 deficiency?

The consequences and severity of B12 deficiency are variable depending on the degree of deficiency and its duration. Major organ systems affected include the blood, bone marrow and nervous system.

Which fruit is rich in vitamin B12?

There are ten major sources of vitamin B12 fruits. These are apples, bananas, oranges, mangoes, strawberries, guava, avocado, pomegranate, kiwi, and blueberries. Apples- Apples rank first in the vitamin B12 fruits list.

Why do I keep waking up drenched in sweat?

Things like alcohol, spicy foods, caffeine and smoking can be sweating triggers. Keep your bedroom cool and sleepwear light. Adjust the thermostat, use fans, open windows (if it's cold outside), wear breathable pajamas and use lightweight bedding. Cool yourself down.

What autoimmune diseases cause night sweats?

Night sweats can sometimes be a symptom of autoimmune disorders like rheumatoid arthritis, multiple sclerosis, celiac disease, and lupus.

Does a bad liver make you sweat at night?

Excessive night sweats can also be a worrying sign of fatty liver disease. Affected individuals may wake up soaking wet, even when the room is cool. This symptom can be quite unsettling and might be confused with other health issues.

Can too many blankets cause night sweats?

Sometimes you may wake up after sweating heavily, particularly if you're sleeping under too many blankets or your bedroom is too warm. Although uncomfortable, these episodes aren't usually considered night sweats and aren't sign of an underlying condition or illness.

Why do I sweat when I'm in a deep sleep?

Other Causes of Night Sweats Numerous other health conditions are associated with night sweats, including: Anxiety Post-traumatic stress disorder (PTSD) Chronic fatigue syndrome Obesity Gastroesophageal reflux Alcohol and opioid use Caffeine withdrawal It's important to note that other than underlying health issues, ...

What are the causes of night sweats in females?

Night sweats, like hot flashes, are often related to hormone changes that make it harder for your brain to regulate your body temperature. Night sweats are common in menopause, perimenopause, pregnancy and (in some cases) at certain points during your menstrual cycle.

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