Excessive sleepiness in the day
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Rapidly falling asleep in the middle of something
Tend to sleep during the day
Suddenly feeling extremely drowsy
Drowsy during the day
Sleepy during daytime
Sleepy during the day
Abrupt drowsiness
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Content updated on May 23, 2022
When to See a Doctor
Seek professional care if you experience any of the following symptoms
Excessive sleepiness in the day
Possible Causes
- Sleep disorder
Sleep disorders are conditions that affect the quality, timing or duration of your sleep, impacting your ability to function when you are awake. There are many types of sleep disorders, they include disturbances in the quality or quantity of sleep or excessive daytime sleepiness, abnormal behaviors that occur during sleep, sleep disorder related to a mental disorder and many more.
- Premenstrual syndrome (PMS)
PMS consists of both mental and physical symptoms, occurring 3-10 days before menses. Symptoms start to improve once menses begins. The cause of PMS is poorly understood, but is related to fluctuations in levels of female hormones.
- Dehydration
Dehydration occurs when you lose more fluid than you take in, and your body does not have as much water as it needs. Common causes of dehydration include inadequate intake, diarrhea, vomiting and fever. Dehydration can also lead to serious complications including seizures, urinary and kidney problems.
- Sleep apnea syndrome
Narcolepsy
- Cerebellar hemorrhage / infarction
- Morning sickness
Related Serious Diseases
- Hypoglycemia
Low blood sugar levels. This can fatal as the brain depends on sugar for energy. It is usually caused by diabetes medications, but can also be caused by hormone disorders and insulin overproduction.
- Hepatic encephalopathy
- Brain tumor
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Do you often feel sleepy, doze off or take naps in the day?
Do you feel you have put on weight across your whole body (not just around the tummy)?
Do you have headaches or does your head feel heavy?
Have you ever woken up at night because you were breathless or struggling to breathe?
Have you ever been diagnosed with high blood pressure or are you taking medication for your blood pressure?
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Symptoms treated by the same specialty
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Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan