a possible sleep disorder health problem such as stress, hormonal changes, poor nutrition, or drinking alcoholic beverages may cause daytime Sleepiness. sleeping less than 6 hours at night?? Medication - If you are taking any medication, find out what the side effects are. Excessive Daytime Sleepiness Excessive Daytime Sleepiness (EDS) disorder is a condition in which an individual feels drowsy during the day even after getting enough sleep at night. This disorder can significantly interfere with a person’s ability to perform normal daily activities. People with EDS often suffer from low self-esteem, frustration and anger about being misunderstood and regarded as unintelligent and lazy.