Aerobic exercise
Learning Center
Hepatitis C
Many people with this infection don't know they have it. Find out about symptoms and treatment for this liver disease that can be dangerous.
Kidney stones
Learn about the symptoms, risks, causes and treatment of this often intensely painful condition.
Soft tissue sarcoma
This rare type of cancer can begin in the muscles, fat, blood vessels, nerves, tendons and the lining of joints. Treatment usually includes surgery.
Phantosmia: What causes olfactory hallucinations?
Phantosmia is often due to a head injury or upper respiratory infection.
Female orgasm: No climax with vaginal penetration?
Not all women have orgasms with vaginal penetration during sex. Most women need stimulation of the clitoris to climax.
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.
Tonic-clonic (grand mal) seizure
Learn about this type of seizure that can cause convulsions. Also know how to help if you see someone having one.
Overdue pregnancy: What to do when baby's overdue
Past your due date? Understand why a pregnancy might be overdue and what's next.
Video: HSG test for female infertility
Video animation shows the HSG test — an X-ray study to identify causes of female infertility.
Lack of sleep: Can it make you sick?
Lack of sleep can affect your immune system. Here's what you need to know.
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