Recent Blog Articles
Poliovirus in wastewater: Should we be concerned?
Recognizing and preventing sun allergies
If cannabis becomes a problem: How to manage withdrawal
Corneal transplants becoming more common
An emerging treatment option for men on active surveillance
Gun violence: A long-lasting toll on children and teens
Adult female acne: Why it happens and the emotional toll
Talking to your doctor about your LGBTQ+ sex life
Untangling grief: Living beyond a great loss
Thunderstorm asthma: Bad weather, allergies, and asthma attacks
How much sleep do we really need?
Ask the doctor
Q. How much sleep do we really need, and what happens if we get too little or too much?
A. We spend about a third of our lives sleeping, so you've asked an important question.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.Sign Me Up
Already a member? Login ».
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
Free Healthbeat Signup
Get the latest in health news delivered to your inbox!