Night sweats—episodes of excessive sweating during sleep that soak your clothes or bedding—can be linked to a range of medical conditions. Sometimes they’re harmless (like a warm room), but persistent or severe night sweats deserve attention.

Here are some of the more common causes:

1. Infections

Certain infections can trigger night sweats as your body fights illness. These include:

• Tuberculosis
• HIV/AIDS
• Endocarditis

They’re often accompanied by fever, fatigue, or weight loss.

2. Hormonal Changes

Hormone fluctuations are a very common cause, especially:

• Menopause (hot flashes at night)
• Hyperthyroidism

These can disrupt your body’s temperature regulation.

3. Cancers

In some cases, night sweats can be associated with certain cancers, particularly:

• Lymphoma

This usually comes with other symptoms like unexplained weight loss or swollen lymph nodes.

4. Medications

Some medications can cause sweating as a side effect, including:

• Antidepressants
• Acetaminophen

5. Low Blood Sugar

People with diabetes may experience night sweats due to:

• Hypoglycemia

6. Anxiety and Stress

Emotional factors like anxiety or panic attacks can also lead to sweating during sleep, even without a physical illness.

When should you see a doctor?

You should consider medical advice if night sweats:

• Happen frequently or severely
• Are accompanied by fever, weight loss, or fatigue
• Wake you regularly or disrupt sleep

Bottom line

Night sweats aren’t a diagnosis on their own—they’re a symptom. The cause can range from something minor (like room temperature) to more serious conditions. If they persist or come with other symptoms, it’s worth getting checked to find the underlying reason.