Night Sweats

Written by Zulekha Nishad

Last Updated May 29, 2024

Have you ever woken up in the middle of the night drenched in sweat, only to realize your bedroom isn't particularly warm? If so, you might have experienced night sweats. This common phenomenon can be both uncomfortable and concerning, leaving many to wonder about its causes and potential treatments.

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In this blog post, we'll explain in detail what night sweats are, explore various causes ranging from hormonal changes to medical conditions, and discuss effective treatments and home remedies. By the end, you'll have a better understanding of the topic and know when it's time to seek medical advice.

Key Takeaways:

  • Night sweats (nocturnal hyperhidrosis) refer to excessive sweating during the night, which can disrupt sleep and affect overall quality of life.
  • Understanding the underlying causes of night sweats, such as hormonal fluctuations, infections, and metabolic changes, is essential for determining appropriate treatment and management strategies.
  • Identifying and addressing the specific cause of night sweats, whether through lifestyle changes, medical interventions, or supportive therapies, can help alleviate this bothersome symptom and improve your well-being.
Night Sweats: Causes, Home Remedies, and More

What are Night Sweats?

Night sweats, also known as nocturnal hyperhidrosis, are episodes of excessive sweating during the night. This sweating can be so intense that it soaks through your pajamas and sheets, often waking you up and disturbing your sleep. Unlike hot flashes, which are short and typically involve a feeling of warmth, night sweats last longer and are characterized by significant sweating rather than just feeling hot.

It's essential to distinguish night sweats from simply being too warm due to excessive bedding, like using too many blankets or a high bedroom temperature, as the latter is usually a straightforward issue of environmental control.

Causes of Night Sweats

A middle-aged woman fanning herself while sitting on a bed, representing menopause symptoms

Night sweats can result from various factors, ranging from natural hormonal changes to more serious underlying health conditions. Here's a closer look at some common causes:


Menopause is a significant phase in a woman's life characterized by the cessation of menstrual periods and a drop in estrogen levels. This hormonal shift often leads to hot flashes and night sweats, collectively known as vasomotor symptoms.

  • Hormonal Fluctuations: The primary cause of menopause-related night sweats is the decrease in estrogen, which affects the hypothalamus, the brain's temperature regulation center.
  • Frequency and Severity: These night sweats can be frequent and intense, often occurring several times a week or even nightly.
  • Impact on Sleep: The severity can range from mild to severe, significantly disrupting sleep and leading to insomnia, fatigue, and reduced quality of life.

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Premenstrual Syndrome (PMS)

PMS can cause a range of symptoms due to hormonal fluctuations, including night sweats. Women might experience these sweats in the days leading up to their menstrual period.

  • Hormonal Influence: The cyclical rise and fall of estrogen and progesterone can influence body temperature regulation and result in night sweats.
  • Associated Symptoms: Along with night sweats, PMS may cause mood swings, bloating, headaches, and breast tenderness.
A woman waking up in bed, drenched in sweat, looking uncomfortable and holding her head


Hormonal changes during pregnancy can also lead to night sweats. Increased blood flow and metabolic rate contribute to this condition, especially in the first and third trimesters.

  • Early Pregnancy: In the first trimester, rising hormone levels and increased metabolism can trigger night sweats.
  • Late Pregnancy: In the third trimester, increased blood flow and the body's effort to cool down due to carrying extra weight can cause excessive sweating.
  • Postpartum Period: Hormonal adjustments after childbirth can also lead to night sweats.

Underlying Infections

Infections such as tuberculosis, HIV, and bacterial infections can cause fever and night sweats as the body fights off these invaders.

Low Blood Sugar (Hypoglycemia)

Low blood sugar, particularly in individuals with diabetes, can cause night sweats as the body reacts to the drop in glucose levels.

  • Diabetes Management: Poorly controlled diabetes can lead to hypoglycemia, especially during the night if blood sugar levels drop too low.
  • Symptoms: Night sweats due to hypoglycemia are often accompanied by other symptoms such as trembling, hunger, confusion, and headaches.
  • Preventive Measures: Managing blood sugar levels with proper diet, medication, and monitoring can help prevent nocturnal hypoglycemia and associated night sweats.

Substance Abuse

Alcohol and drug use can interfere with the body's temperature regulation, leading to night sweats. Withdrawal from certain substances can also trigger sweating.


Certain cancers, particularly lymphomas and leukemias, are known to cause night sweats. This symptom often accompanies unexplained weight loss and fever.

  • Lymphoma: Night sweats, along with enlarged lymph nodes, weight loss, and fatigue, are common symptoms of lymphoma.
  • Leukemia: This type of cancer can also cause night sweats, often in conjunction with fever, fatigue, and frequent infections.

Sleep Disorders

Conditions like sleep apnea, characterized by interrupted breathing during sleep, can lead to night sweats due to the body's stress response.

  • Obstructive Sleep Apnea (OSA): Episodes of paused breathing cause the body to wake briefly, often resulting in night sweats.
  • Restless Leg Syndrome (RLS): This disorder may also disrupt sleep and cause sweating due to frequent movements and discomfort.


Anxiety and stress can activate the body's fight-or-flight response, resulting in increased sweating, including night sweats.

  • Psychological Stress: High levels of stress or anxiety can increase adrenaline production, which in turn raises body temperature and sweating.
  • Panic Attacks: These can occur at night, leading to intense sweating and heart palpitations.

Neurological Conditions

Disorders affecting the nervous system, such as autonomic dysreflexia or stroke, can disrupt the body's ability to regulate temperature.


An underactive thyroid gland can affect metabolism and body temperature regulation, potentially leading to night sweats.

  • Thyroid Function: Low thyroid hormone levels can disrupt the body's normal temperature regulation, causing too much sweat.
  • Associated Symptoms: Fatigue, weight gain, and cold intolerance often accompany hypothyroidism.


Certain medications, including antidepressants, antipyretics, and hormone therapy, can have side effects that include night sweats.

A person holding a glass of water and a pill, indicating medication-induced night sweats

Home Remedies for Night Sweats

An infographic showing home remedies for those who experience night sweats

If you're experiencing night sweats, several home remedies can help manage the condition and help you sleep cooler at night:

  • Keep Cool: Maintain a cool bedroom environment with fans or air conditioning. Use a programmable thermostat to ensure the temperature stays low at night.
  • Breathable Bedding: Use lightweight, moisture-wicking fabrics for bedding and sleepwear. Natural fibers like cotton and bamboo are excellent choices. Apart from that, using cooling mattresses and mattress toppers work great in managing night sweats.
  • Stay Hydrated: Drink plenty of water to help regulate body temperature. Avoid dehydration, which can worsen sweating.
  • Healthy Diet: Avoid spicy foods, caffeine, and alcohol before bedtime. These substances can increase body temperature and trigger night sweats.
  • Stress Management: Practice relaxation techniques such as yoga, meditation, or deep-breathing exercises to reduce stress and anxiety. Mindfulness and cognitive-behavioral therapy (CBT) can also be effective.
  • Regular Exercise: Engage in regular physical activity, but avoid intense workouts close to bedtime as they can raise body temperature.
  • Sleep Hygiene: Establish a regular sleep routine with a consistent bedtime and wake-up time. Create a calming pre-sleep ritual to help your body wind down.

When to See a Doctor?

A doctor discussing symptoms with a patient in an office, highlighting the importance of seeking medical advice for persistent night sweats.

While occasional night sweats might not be a cause for concern, persistent or severe episodes warrant a visit to a healthcare provider. If night sweats are accompanied by symptoms like unexplained weight loss, fever, or fatigue, it's crucial to seek medical advice to rule out serious conditions like infections or cancer.

  • Persistent Symptoms: If night sweats occur regularly and do not improve with lifestyle changes, consult a doctor.
  • Associated Symptoms: Seek medical attention if you experience additional symptoms like fever, significant weight loss, fatigue, or swelling in lymph nodes.
  • Medical Evaluation: A thorough medical evaluation may include a physical examination, imaging studies, blood tests, and possibly a referral to a specialist, depending on the suspected cause.

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1. What is the most common cause of persistent night sweats?

The most common cause of persistent night sweats is hormonal changes, particularly those associated with menopause.

2. What is the difference between night sweats and hot flashes?

Night sweats are episodes of excessive sweating that occur during sleep, whereas hot flashes are sudden sensations of intense heat that can occur at any time, day or night.

3. How can you treat night sweats?

Night sweats can be treated through lifestyle changes, such as cooling the bedroom and wearing breathable fabrics, managing stress, and addressing underlying conditions with medications or therapy. For menopausal symptoms, hormone replacement therapy may be recommended.

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Disclaimer: What is said in this article has been referenced from multiple sources and is intended only for educational and informational purposes. Please note that no content in this article is a substitute for professional advice from a qualified doctor or healthcare provider. Always consult an experienced doctor with any concerns you may have regarding a health condition or treatment, and never disregard any medical suggestions or delay in seeking treatment because of something you read here.

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