Toddler health
Learning Center
Headaches during pregnancy: What's the best treatment?
Here's help with preventing or easing this common type of pain while you're pregnant.
Heart cancer: Is there such a thing?
Although heart tumors do occur, the vast majority of them are noncancerous (benign).
Heart rate: What's normal?
A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Hemorrhoids during pregnancy: What's the best treatment?
Know how to relieve painful, swollen veins in the anus and rectum during pregnancy.
High-dose flu vaccines: How are they different from other flu vaccines?
High-dose flu vaccines are flu vaccines for older people.
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.
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.
Hyperinsulinemia: Is it diabetes?
Hyperinsulinemia often is associated with type 2 diabetes.
Hypothyroidism and infertility: Any connection?
For women, there's sometimes a link between having an underactive thyroid gland (hypothyroidism) and infertility.
Isolated systolic hypertension: A health concern?
Both the top and bottom numbers in blood pressure readings hold clues about your health. But if just the top number is high, it might be a concern.
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