Drowsiness can also be a result of your mental, emotional, or psychological state. Depression can greatly increase drowsiness, as can high levels of stress or anxiety. Boredom is another known cause of drowsiness. If you're experiencing any of these mental conditions, you're also likely to feel fatigued and apathetic.

How do I stop feeling drowsy?

Why have I been feeling so drowsy lately?

You may be too exhausted even to manage your daily affairs. In most cases, there's a reason for the fatigue. It might be allergic rhinitis, anemia, depression, fibromyalgia, chronic kidney disease, liver disease, lung disease (COPD), a bacterial or viral infection, or some other health condition.