Night sweats what it can mean

Overview

Night sweats are episodes of heavy sweating during sleep that can soak your nightclothes or bedding. They are not caused by a hot bedroom or too many blankets. Night sweats can be a sign of an underlying condition, but often they are not harmful.

Yes, night sweats are quite common. Many people experience them at some point.

Night sweats can affect people of all ages, but they are more common during certain life stages, such as menopause in women, or with infections and medications.

Symptoms

Common symptoms

• Waking up with drenched nightclothes or bedding
• Feeling hot or flushed during the night
• Sweating that is not related to the temperature of your room

Symptoms in children

• Children may experience night sweats with common infections like colds or ear infections. They often have a fever at the same time.

Symptoms in older adults

• In older adults, night sweats may be linked to medications, hormonal changes, or chronic conditions like infections or cancer. It's important to see a doctor to rule out serious causes.

Causes

Main causes

• Infections like tuberculosis, endocarditis (infection of the heart valves), or HIV
• Hormonal changes such as menopause or androgen deprivation therapy for prostate cancer
• Medications including some antidepressants, hormone therapies, and diabetes medicines
• Low blood sugar (hypoglycemia) at night
• Anxiety or stress
• Overactive thyroid (hyperthyroidism)
• Certain cancers like lymphoma or leukemia (night sweats are a rare symptom)

Risk factors

• Being in menopause or perimenopause
• Taking certain medications
• Having a chronic infection like HIV or tuberculosis
• Having a family history of certain cancers
• Having an overactive thyroid

When to see a doctor

See a doctor urgently if:

• If night sweats are accompanied by fever, weight loss, or swollen lymph nodes
• If you have a cough that won't go away
• If you have pain in one area of your body, especially if it's new or worsening

Book a routine appointment if:

• If night sweats persist for more than a few weeks without an obvious cause
• If they disturb your sleep and affect your daytime energy
• If you are waking up drenched every night

Diagnosis

Your doctor will ask about your medical history, medications, and lifestyle. They may ask if you have other symptoms, like fever or weight loss. A physical exam can check for signs of infection or other conditions.

Tests that may be done

• Blood tests (full blood count, thyroid function, infection markers)
• Sweat test (for cystic fibrosis in certain cases)
• Imaging like chest X-ray or CT scan if infection or cancer is suspected
• Biopsy of lymph node if swollen

What to expect at your appointment

Your doctor will work with you to find the cause. Most of the time, the tests show a simple explanation like an infection or hormonal change. If needed, you may be referred to a specialist.

Treatment

Treatment for night sweats depends on the underlying cause. If it is due to a medication, your doctor may adjust the dose or switch to a different one. If due to an infection, treating the infection will often resolve the sweats. For menopause-related sweats, lifestyle changes and sometimes hormone therapy can help.

Self-care at home

• Keep your bedroom cool and use a fan.
• Wear lightweight, breathable cotton pajamas.
• Use layers of bedding that you can remove if you get hot.
• Avoid spicy foods, caffeine, and alcohol before bed.
• Practice relaxation techniques to reduce stress.

Medical treatments

Depending on the cause, treatments may include antibiotics or antiviral drugs for infections, hormone replacement therapy for menopause, or treatments to control an overactive thyroid. For cancer-related night sweats, treatment of the cancer itself is needed. Always talk to your doctor about the best approach for you.

When is surgery considered?

Surgery is not typically used to treat night sweats. However, if night sweats are caused by a condition that requires surgery, such as a tumor, then that surgery may be needed.

Living with this condition

Night sweats can be disruptive, but you can take steps to reduce their impact. Keep a change of clothes and a towel by your bed. If your sleep is affected, try to rest during the day if possible. You may feel tired, so be gentle with yourself.

Lifestyle tips

• Stay hydrated by drinking water during the day.
• Maintain a healthy weight, as excess weight can make hot flashes worse.
• Exercise regularly, but avoid vigorous activity right before bed.

Diet and exercise

Eat a balanced diet with plenty of fruits and vegetables. Avoid trigger foods like spicy dishes, hot drinks, and alcohol. Gentle exercise like walking can help improve sleep quality and reduce stress.

Mental health and emotional wellbeing

Night sweats can cause anxiety, especially if you worry about what they mean. They can also disrupt sleep, leading to fatigue and irritability. If you feel stressed or anxious, talk to your doctor or a counselor. You are not alone.

Prevention

Not all night sweats can be prevented, but you can reduce your risk by staying healthy, managing stress, and avoiding known triggers. If night sweats are caused by a medication, talk to your doctor about alternatives.

Vaccines

Vaccines can prevent some infections that cause night sweats, but there is no vaccine specifically for night sweats.

Screening programmes

Regular check-ups and screening for conditions like thyroid disease or certain cancers can help catch problems early. But there is no specific screening test for night sweats.

Complications

If left untreated

• If night sweats are caused by an untreated infection, it can lead to more serious illness.
• If caused by cancer, delaying diagnosis could affect treatment success.
• If caused by an overactive thyroid, untreated it can affect heart health.

Long-term outlook

The outlook for night sweats depends on the cause. Many times, night sweats are harmless and go away on their own or with simple treatment. Even when caused by a more serious condition, early detection and treatment often lead to good outcomes. Your doctor is there to help you find the cause and get the right care.

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