Breast health
Learning Center
Hypothyroidism symptoms: Can hypothyroidism cause eye problems?
Hypothyroidism symptoms can vary, but eye problems aren't usually a concern.
Hypothyroidism and infertility: Any connection?
For women, there's sometimes a link between having an underactive thyroid gland (hypothyroidism) and infertility.
Hypnobirthing: How does it work?
Hypnobirthing — A Mayo Clinic specialist discusses this method of easing pain during childbirth.
Hypertensive crisis: What are the symptoms?
A sudden rise in blood pressure over 180/120 mm Hg is considered a medical emergency, or crisis. It can lead to a stroke. Know the symptoms.
Hyperinflated lungs: What does it mean?
If you can’t breathe out well, as in COPD, air may get trapped inside your lungs. As you breathe in more air over time, your lungs get too big and stiff.
How do COVID-19 antibody tests differ from diagnostic tests?
Antibody testing shows whether you've had the COVID-19 virus in the past. It's not the same as testing to see whether you have the virus now.
High-dose flu vaccines: How are they different from other flu vaccines?
High-dose flu vaccines are flu vaccines for older people.
Hepatitis C: What happens in end-stage liver disease?
End-stage complications of hepatitis C include liver failure and liver cancer.
Hemorrhoids during pregnancy: What's the best treatment?
Know how to relieve painful, swollen veins in the anus and rectum during pregnancy.
Headaches during pregnancy: What's the best treatment?
Headaches during pregnancy are common. Here's help easing the pain.
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