For some people, the symptom that brings them into the doctor’s office is an uncomfortable amount of sweating during sleep without a clear reason. Potential causes include environmental factors, medication side effects, hormonal fluctuations, low blood sugar, indigestion, and illness. Often, we find out that the person was suffering from sleep apnea. In fact, night sweats may be three times more common in patients with sleep apnea than in the general population. Not everyone with sleep apnea snores loudly, but the intermittent gasping or struggling for air during sleep can lead to swings in adrenaline, which in turn can lead to excessive sweating. A sleep consultation can help narrow down potential causes of night sweats and prompt the appropriate testing.