Recent Blog Articles
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15477/conversions/59f61b05-2e23-463a-a0f7-b8aef6addd73-micro.jpg)
Testosterone-blocking drugs boost heart disease risk when given in combination
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15472/conversions/9f706d6e-3ba5-441f-a1ce-d93af96cdb5d-micro.jpg)
Parenting isn't easy: Two important skills can help
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14937/conversions/fcff561e-5fc9-4fbd-aac0-b9ea3778052b-micro.jpg)
Does sleeping with an eye mask improve learning and alertness?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15415/conversions/2acee670-1e43-413e-a07b-437512d22803-micro.jpg)
Do tattoos cause lymphoma?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14051/conversions/dea50ed5-99ea-4779-aa5b-56fae11aaa92-micro.jpg)
Hot weather hikes: Staying safe when temperatures spike
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15405/conversions/f22b5f3d-fd64-479d-b10a-b2409347f160-micro.jpg)
Cannabis drinks: How do they compare to alcohol?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15404/conversions/ccd2e44a-96c4-492f-a05c-c2706549efc0-micro.jpg)
What is Lewy body dementia?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15083/conversions/2fa8315b-f48e-43fb-8b56-d681a1715343-micro.jpg)
Dog bites: How to prevent or treat them
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15386/conversions/33679f9f-8065-4e13-a188-2ca67472b36f-micro.jpg)
Ever read your medical record? Here's why you should
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14810/conversions/778f3d8c-0b73-420c-8d03-e8542d49660d-micro.jpg)
Shining light on night blindness
Harvard Health Experts and Contributors
List of Experts
![photo of Samar Hafida, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10333/Samer-Hafid-MD-cropped-e1603398431568.jpg)
Samar Hafida, MD
Contributor
![photo of Kathleen Haley, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10271/KJH-aug-2020.jpg)
Kathleen Haley, MD
Contributor
![photo of Daniel L. Hall, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9724/Daniel-Hall-headshot.jpg)
Daniel L. Hall, PhD
Contributor
![photo of Florencia Halperin, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9857/Headshot-Florencia-Halperin-square.jpg)
Florencia Halperin, MD
Contributor
![photo of Matthew Hamilton, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/YG7LIQmehvWXkJim7X6afI2uCtT3mPWul2UagZqP.jpg)
Matthew Hamilton, MD
Contributor
![photo of Syed Moin Hassan, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10174/hass-final1.jpg)
Syed Moin Hassan, MD
Contributor
![photo of Kathryn Hatch, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10176/headshotHatch.jpg)
Kathryn Hatch, MD
Contributor
![photo of Marissa Hauptman, MD, MPH](https://d2icykjy7h7x7e.cloudfront.net/authors/cwe260iHPzwBaTTCVjFuZHtNUgDPSnwHQJ6dJs3f.jpg)
Marissa Hauptman, MD, MPH
Contributor
![photo of Chester Hedgepeth, III, MD, PhD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10286/Chester-Hedgepeth.jpg)
Chester Hedgepeth, III, MD, PhD
Contributor
![photo of Jeffrey S. Heier, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/mcmMsxocTVxUoaEXd5bKjJH79WYAMpcRuqVqIg3k.jpg)
Jeffrey S. Heier, MD
Contributor
![photo of Brandi Henson, PsyD](https://domf5oio6qrcr.cloudfront.net/medialibrary/10003/Brandi-Henson.png)
Brandi Henson, PsyD
Contributor
![photo of David Hepner, MD, MPH](https://domf5oio6qrcr.cloudfront.net/medialibrary/10015/Hepner-DavidMD.jpg)
David Hepner, MD, MPH
Contributor
![photo of Kevin Hill, MD, MHS](https://d2icykjy7h7x7e.cloudfront.net/authors/Uy7FEGw2GGseRcnavGdc22Z8qJct0JeygLTxvSrS.jpg)
Kevin Hill, MD, MHS
Contributor
![photo of Eric Holbrook, MD](https://domf5oio6qrcr.cloudfront.net/medialibrary/9641/Eric-Holbrook-2.jpg)
Eric Holbrook, MD
Contributor
![photo of Sigmund Hough, PhD, ABPP/rp](https://domf5oio6qrcr.cloudfront.net/medialibrary/8722/sigmund-hough.jpg)
Sigmund Hough, PhD, ABPP/rp
Contributing Editor
![photo of Michael Hsu, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/VtCxTkh5VUa3efxske1vqJRko2w8r6yFISin0nZq.jpg)
Michael Hsu, MD
Guest Contributor
![photo of Frank Hu, MD, MPH, PhD](https://d2icykjy7h7x7e.cloudfront.net/authors/28KAHKy7yljdtXewCVSODjEM5Bb4IpBWIpaIz4i1.png)
Frank Hu, MD, MPH, PhD
Contributor
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Thomas Hübl
Guest Contributor
![photo of Kimberly Humphrey, MD, MPH](https://d2icykjy7h7x7e.cloudfront.net/authors/b9jV9EMC2yiUqdK1VM9rJ4iB5oVfTDEcrkeuCu7u.jpg)
Kimberly Humphrey, MD, MPH
Contributor
![photo of Kristin Hung, MD](https://d2icykjy7h7x7e.cloudfront.net/authors/oVzfs6QqLSo1R6yUhBYK6l7kjabB47FowaAbP31l.jpg)
Kristin Hung, MD
Contributor
Recent Blog Articles
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15477/conversions/59f61b05-2e23-463a-a0f7-b8aef6addd73-micro.jpg)
Testosterone-blocking drugs boost heart disease risk when given in combination
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15472/conversions/9f706d6e-3ba5-441f-a1ce-d93af96cdb5d-micro.jpg)
Parenting isn't easy: Two important skills can help
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14937/conversions/fcff561e-5fc9-4fbd-aac0-b9ea3778052b-micro.jpg)
Does sleeping with an eye mask improve learning and alertness?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15415/conversions/2acee670-1e43-413e-a07b-437512d22803-micro.jpg)
Do tattoos cause lymphoma?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14051/conversions/dea50ed5-99ea-4779-aa5b-56fae11aaa92-micro.jpg)
Hot weather hikes: Staying safe when temperatures spike
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15405/conversions/f22b5f3d-fd64-479d-b10a-b2409347f160-micro.jpg)
Cannabis drinks: How do they compare to alcohol?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15404/conversions/ccd2e44a-96c4-492f-a05c-c2706549efc0-micro.jpg)
What is Lewy body dementia?
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15083/conversions/2fa8315b-f48e-43fb-8b56-d681a1715343-micro.jpg)
Dog bites: How to prevent or treat them
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/15386/conversions/33679f9f-8065-4e13-a188-2ca67472b36f-micro.jpg)
Ever read your medical record? Here's why you should
![blog image 1](https://domf5oio6qrcr.cloudfront.net/medialibrary/14810/conversions/778f3d8c-0b73-420c-8d03-e8542d49660d-micro.jpg)
Shining light on night blindness