You wake up in the middle of the night.

Your shirt is damp.

The sheets feel warm.

You may have to change clothes.

Many people immediately think of hormones, stress, or room temperature.

But in some cases, recurring night sweats can be linked to disrupted breathing during sleep.

---

What causes night sweats in general?

Night sweats can happen for many reasons, including:

• Hormonal changes

• Infections

• Anxiety or stress

• Certain medications

• Blood sugar fluctuations

But there is another mechanism that is often overlooked: repeated adrenaline surges during sleep.

---

How sleep apnea can trigger sweating

During obstructive sleep apnea:

• The airway collapses

• Oxygen levels drop

• Carbon dioxide rises

• The brain briefly activates to restart breathing

When this happens, the body switches into “fight-or-flight” mode.

That surge activates the sympathetic nervous system and releases stress hormones such as adrenaline.

Adrenaline increases:

• Heart rate

• Blood pressure

• Body temperature

• Sweat gland activity

If these episodes repeat multiple times per night, sweating can become frequent — even without full awakening.

---

Why it is often misinterpreted

Because night sweats are commonly associated with menopause, anxiety, or illness, breathing-related causes are rarely considered.

Clues that sleep apnea may be involved:

• Loud snoring

• Witnessed breathing pauses

• Morning headaches

• Dry mouth

• Daytime fatigue

• Waking with a racing heart

If night sweats appear alongside these symptoms, the connection becomes more likely.

---

Is it common?

Studies have shown that night sweating is more frequent in people with untreated sleep apnea compared to the general population.

In some cases, sweating improves significantly after starting CPAP therapy.

---

When to seek evaluation

Night sweats should always be evaluated if they are:

• Persistent

• Severe

• Accompanied by weight loss or fever

• Associated with cardiovascular symptoms

But if medical causes are ruled out and fatigue continues, a sleep assessment may be appropriate.

---

Sweating at night is your body reacting to something.

If your breathing repeatedly stops while you sleep, your nervous system may be fighting — even if you are unaware.

Sometimes the problem is not the room temperature.

It is the oxygen level.