When you feel sleepy but need to stay awake, there are strategies you can use to do so, as well as ways to prevent that feeling of sleep from the start. You may experience excessive daytime sleepiness, difficulty sleeping, or you may want to sleep late into the night.
If you are not in good health, you might say. Don't just feel like
you're not here. You may find that you feel tired, your digestive system does not function normally, and you appear to have a cold. Mentally, you may find that you cannot concentrate and feel anxious or depressed.