Could sleep apnea or another medical condition be causing your sleepiness? WebMD looks at various medical conditions that disrupt your sleep, and what to do about them.

Excessive daytime sleepiness (EDS) is a symptom in which extreme sleepiness occurs during the day, even when you’ve gotten enough sleep at night. EDS is more than feeling groggy and …

Excessive sleepiness can occur for many different reasons. Here are some of the physical, psychological and pharmacological reasons you might be experiencing sleepiness during the …

Always exhausted and fighting sleep during the day? Excessive daytime sleepiness is a common; here's what to know about its causes, symptoms, and treatment.