DrowsinessSleepiness - during the day; Hypersomnia; Somnolence
Drowsiness refers to feeling abnormally sleepy during the day. People who are drowsy may fall asleep in inappropriate situations or at inappropriate times.
Excessive daytime sleepiness (without a known cause) may be a sign of a sleep disorder.
Depression may be described as feeling sad, blue, unhappy, miserable, or down in the dumps. Most of us feel this way at one time or another for shor...
Generalized anxiety disorder (GAD) is a mental disorder in which a person is often worried or anxious about many things and finds it hard to control ...
Stress is a feeling of emotional or physical tension. It can come from any event or thought that makes you feel frustrated, angry, or nervous. Stres...
Fatigue is a feeling of weariness, tiredness, or lack of energy.
Drowsiness may be due to the following:
- Long-term (chronic) pain
- Having to work long hours or different shifts (nights, weekends)
- Long-term insomnia and other problems falling or staying asleep
- Changes in blood sodium levels (hyponatremia or hypernatremia)
- Medicines (tranquilizers, sleeping pills, antihistamines)
- Not sleeping long enough
- Sleep disorders (such as sleep apnea and narcolepsy)
Obstructive sleep apnea (OSA) is a problem in which your breathing pauses during sleep. This occurs because of narrowed or blocked airways.
- Too much calcium in your blood (hypercalcemia)
- Underactive thyroid (hypothyroidism)
You can relieve drowsiness by treating the cause of the problem. First, determine whether your drowsiness is due to depression, anxiety, boredom, or stress. If you are not sure, talk with your health care provider.
For drowsiness due to medicines, talk to your provider about switching or stopping your medicines. But, DO NOT stop taking or change your medicine without first talking to your provider.
What to Expect at Your Office Visit
Your provider will examine you to determine the cause of your drowsiness. You will be asked about your sleep patterns and health. Questions may include:
- How well do you sleep?
- How much do you sleep?
- Do you snore?
- Do you fall asleep during the day when you do not plan to nap (such as when watching TV or reading)? If so, do you awake feeling refreshed? How often does this happen?
- Are you depressed, anxious, stressed, or bored?
- What medicines do you take?
- What have you done to try to relieve the drowsiness? How well did it work?
- What other symptoms do you have?
Tests that may be done include:
- Blood tests (such as a CBC and blood differential, blood sugar level, electrolytes, and thyroid hormone levels)
A complete blood count (CBC) test measures the following:The number of red blood cells (RBC count)The number of white blood cells (WBC count)The tota...
- CT scan of the head
- Electroencephalogram (EEG)
- Sleep studies
- Urine tests (such as a urinalysis)
Treatment depends on the cause of your drowsiness.
Chokroverty S, Avidan AY. Sleep and its disorders. In: Daroff RB, Jankovic J, Mazziotta JC, Pomeroy SL, eds. Bradley's Neurology in Clinical Practice. 7th ed. Philadelphia, PA: Elsevier; 2016:chap 102.
Hirshkowitz M, Sharafkhaneh A. Evaluating sleepiness. In: Kryger M, Roth T, Dement WC, eds. Principles and Practice of Sleep Medicine. 6th ed. Philadelphia, PA: Elsevier; 2017:chap 169.
Review Date: 8/14/2017
Reviewed By: Fred K. Berger, MD, addiction and forensic psychiatrist, Scripps Memorial Hospital, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.