Night eating syndrome is a combination of insomnia and binge eating disorder; an individual eats a regular diet during the day, but binges after the evening meal or during the night when they can’t sleep. The disease can be accompanied by the feeling of needing to eat to get back to sleep. — Definition WebMD Night eating syndrome (NES) is a condition that combines overeating at night with sleep problems. With NES, you eat a lot after dinner, have trouble sleeping, and eat when you wake up at night.