Fitness basics
Learning Center
GERD: Can certain medications make it worse?
Certain medicines can make symptoms of gastroesophageal reflux disease (GERD) worse. Learn more.
HPV infection: A cause of cancer in men?
Learn what types of cancer human papillomavirus can cause and how you can lower your risk.
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.
Hypothyroidism: Does it cause joint pain?
Hypothyroidism can cause muscle and joint problems, such as pain and stiffness.
Is a home sperm test useful?
Using a home sperm test to check your fertility may not provide a clear answer.
Livedo reticularis: When is it a concern?
Learn when this condition that causes a lacy pattern on the skin is simply a result of being chilled or something more serious.
Liver cysts: A cause of stomach pain?
Occasionally, liver cysts can cause pain and discomfort in the upper abdomen.
Loss of sex drive in men: Natural with aging?
Age-related loss of sex drive is normal, but sometimes an underlying condition is at play.
Male masturbation: Does frequency affect male fertility?
Male masturbation has little effect on sperm count or quality.
Migraines and gastrointestinal problems: Is there a link?
Migraines can be associated with certain gastrointestinal problems. Learn more.
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