E. W. Howe

The feeling of sleepiness when you are not in bed, and can't get there, is the meanest feeling in the world.

American Novelist

Sleepiness is subjective. It can vary greatly between individuals and situations.

Subjective Feeling

Sleepiness can affect emotions, making someone appear uninterested or disengaged.

Emotional State

Using 'sleepiness' during daytime can imply that it’s unusual or due to specific reasons.

Daytime Context

 Although we and other scientists have discovered that naps can have benefits for both the brain and for the body, naps can be a double-edged sword. Long naps in the afternoon or in the early evening can just take the edge off your sleepiness. It's a little bit like snacking before your main meal.

Are naps actually good...

 coordinating its activity with the brain. That's where those unpleasant symptoms come in, starting with the surging temperature, aches and pains, and sleepiness. So why do we experience this? When the immune system is under serious attack,