Causes of Night Sweats

Dec 30, 2021 Source: Cainiu Health

Dr. Lin Yunfei

Introduction

1. Menopause: Hot flashes associated with menopause may occur at night and cause sweating—this is a common cause of night sweats in many women. 2. Idiopathic hyperhidrosis: This condition involves chronic excessive sweating without any identifiable underlying medical cause. 3. Tuberculosis: Night sweats are the most common symptom of tuberculosis infection.

Some individuals frequently experience unexplained sweating during sleep. In medical terminology, excessive sweating during nighttime sleep—particularly when it occurs without apparent cause and subsides upon waking—is referred to as “nocturnal hyperhidrosis” or “night sweats.” For instance, a person may sweat profusely during the night but find that the sweating gradually ceases after awakening. So, what causes night sweats? Below, we address this question.

Causes of Night Sweats

1. Menopause

Hot flashes associated with menopause can occur at night and trigger sweating. This is one of the most common causes of night sweats among women.

2. Idiopathic Hyperhidrosis

Idiopathic hyperhidrosis refers to chronic, excessive sweating without any identifiable underlying medical cause.

3. Infections

Tuberculosis is the most common infectious cause of night sweats. However, other bacterial infections—including endocarditis (inflammation of the heart’s inner lining), osteomyelitis (bone infection), and abscesses—can also provoke night sweats. Additionally, night sweats are a recognized symptom of HIV infection.

4. Cancer

Night sweats may be an early sign of certain cancers. Lymphoma is the most commonly associated malignancy. Nevertheless, individuals diagnosed with cancer typically present with additional symptoms, such as unexplained weight loss and fever.

5. Medications

Certain medications can induce night sweats. Antidepressants are among the most frequent culprits. Between 8% and 22% of individuals taking antidepressants report night sweats. Other psychotropic medications—including antipsychotics—may also be associated with this side effect.

6. Hypoglycemia

Individuals experiencing hypoglycemia—especially those using insulin or oral diabetes medications—may develop nocturnal hypoglycemia accompanied by sweating.

7. Hormonal Disorders

Hormonal imbalances can also lead to night sweats. Such disorders include pheochromocytoma, carcinoid syndrome, and hyperthyroidism.

8. Neurological Conditions

Rare neurological conditions—including autonomic dysreflexia, post-traumatic syringomyelia, stroke, and autonomic neuropathy—may result in increased sweating and contribute to night sweats.

The above outlines the primary causes of night sweats. We hope this information proves helpful to you.

View All

What should be done if a child experiences excessive sweating?

In general, children may experience excessive sweating due to various reasons such as a high metabolic rate, mental stress, common cold, hypoglycemia, or hyperthyroidism. Treatment options include general care and medication, which should be conducted under a doctor's guidance. Normally, it is important to ensure the child maintains a balanced diet, avoids picky eating habits, and consumes more foods rich in nutrients such as protein and calcium.