Mayo Clinic 
Mayo Clinic specialists answer health questions.
Updated: 22 min 40 sec ago
Emphysema: Does cold weather make it worse?
In some people with emphysema, breathing cold air can cause narrowing of the airways.
Cholesterol ratio: Is it important?
Cholesterol ratio can be used to predict heart disease risk.
Undigested food in stool: What does it mean?
Undigested food in stool generally isn't a problem unless it's accompanied by other symptoms.
Healthy heart for life: Avoiding heart disease
Preventing heart disease begins with small steps. Find out more about maintaining a healthy heart.
What is compassionate use of experimental drugs?
Compassionate use is a way for people with life-threatening illnesses to get access to experimental treatments.
Nocturnal panic attacks: What causes them?
Nighttime (nocturnal) panic attacks can be very frightening. Learn about causes and treatments.
Grass-fed beef: What are the heart-health benefits?
Grass-fed beef may have heart-health benefits that conventional beef doesn't. Find out more.
HPV infection: How does it cause cervical cancer?
Cervical cancer is most often caused by a genital human papillomavirus (HPV) infection.
Neti pot solution: Can I make my own?
A homemade neti pot solution is just as effective as the over-the-counter variety.
Neti pot: Can it clear your nose?
A neti pot is a container designed to rinse the nasal cavity.
Plugged ears: What is the remedy?
Plugged ears are usually a mild, temporary problem. Learn about potential causes and treatments.
Semen allergy: A cause of infertility?
Semen allergy is a rare but often misdiagnosed condition. Learn about symptoms and treatments.
Curcumin: Can it slow cancer growth?
Some research suggests that curcumin may help prevent or treat cancer.
Air travel with infant: Is it safe?
Air travel with infant — A Mayo Clinic specialist offers travel tips for parents.
Flat stomach: Can girdles tighten abdominal muscles?
Want a flat stomach? Diet and exercise — not undergarments — are what count.
Birth control pills: OK to take indefinitely?
Birth control pills can generally be taken as long as birth control is needed.
Allergy medications and pregnancy: What's safe?
Allergy medications aren't necessarily off-limits during pregnancy. Still, it's important to be cautious.
Eggs: Are they good or bad for my cholesterol?
Get the straight facts about eggs and cholesterol.
Shingles vaccine: Should I get it?
The shingles vaccine is recommended for all adults older than age 60.
Eye dilation: Necessary with every eye exam?
Eye dilation is part of a comprehensive eye exam.