This Is Why You Sweat A Lot When You Sleep: 7 Possible Reasons - Page 3

Infection or fever
When your body is fighting an infection, it can increase its internal temperature to eliminate pathogens, which causes sweating, even when you’re asleep.

Signs to watch for: If you’ve recently had chills, sudden fatigue, or a fever, your body may be fighting a viral or bacterial infection.

Medication side effects
Some medications can cause night sweats as a side effect. These include:

Antidepressants,
Hormone treatments,
Some painkillers and fever reducers.
What to do? If you notice an increase in sweating since taking a medication, talk to your doctor to see if the prescription can be adjusted.