Fitness basics
Learning Center
Coronary artery spasm: Cause for concern?
This sudden, temporary squeezing of the muscles in an artery wall reduces blood flow to the heart. Know the causes and treatment.
Semen allergy: A cause of infertility?
Semen allergy, also called seminal plasma hypersensitivity, is a rare condition that can be easily misdiagnosed. Learn about symptoms and possible treatments.
Mononucleosis and Epstein-Barr: What's the connection?
The Epstein-Barr virus sometimes causes a disease known as mono. Learn who is at risk and what the symptoms are.
Low blood sodium in older adults: A concern?
For older adults, low blood sodium, known as hyponatremia, can cause death if left untreated.
Migraines: Are they triggered by weather changes?
Migraines — Are they triggered by weather changes?
Genital herpes: Can you get it from a toilet seat?
It is nearly impossible to get genital herpes from a toilet seat.
Caffeine: How does it affect blood pressure?
Caffeine can temporarily increase blood pressure, but its long-term effects on blood pressure are unclear.
Anxiety: A cause of high blood pressure?
Anxiety can cause dramatic, temporary increases in blood pressure.
Ebola transmission: Can Ebola spread through the air?
Ebola virus: A Mayo Clinic expert explains how the virus spreads
Does older age increase the risk of atrial fibrillation?
Learn how the risk of getting this common heart rhythm condition can increase with age.
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