Sleep
Learning Center
How many hours of sleep are enough?
Wonder how many hours of sleep are enough? A Mayo Clinic specialist offers guidelines.
Hepatitis C: How common is sexual transmission?
Although hepatitis C is highly contagious, the risk of sexual transmission is very low.
Henoch-Schonlein purpura
Learn about the symptoms, causes and treatment of this blood vessel disease, also called IgA vasculitis, that causes a purplish rash on the lower legs.
Hemorrhoids
There are many effective options for easing the discomfort of hemorrhoids — swollen veins in the anus and lower rectum.
Headaches and hormones: What's the connection?
Headaches are part of life for many people. Understand how hormones can play a role.
Hand swelling during exercise: A concern?
This condition is a common problem, but rarely serious enough to disrupt your routine.
HPV vaccine: Who needs it, how it works
Learn about how the HPV vaccine works, who needs it and what side effects to expect.
HPV infection: How does it cause cervical cancer?
Cervical cancer is most often caused by a genital human papillomavirus (HPV) infection.
Germs: Understand and protect against bacteria, viruses and infections
Learn how to protect against bacteria, viruses and infections.
Genital herpes: Can you get it from a toilet seat?
It is nearly impossible to get genital herpes from a toilet seat.
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