Fitness basics
Learning Center
Blocked tear duct
Watery, irritated eyes may occur when your tears can't drain normally. Learn about this common eye condition that affects newborns and sometimes, adults.
Blood clots during menstruation: A concern?
Blood clots during menstrual periods aren't always a cause for a concern. But passing large clots may be a sign that something is wrong.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
Bone cancer
Bone cancer most commonly affects the long bones in the arms and legs. Some types happen mostly in children, while others affect mostly adults.
Bone density test
If your doctor suspects you have osteoporosis, a bone density test can assess your bone strength. Learn about the risks and results of this procedure.
Bone health: Tips to keep your bones healthy
Find out what you can do to promote and protect bone health.
Bone marrow biopsy and aspiration
Learn what to expect with these tests, which are done to make sure your bone marrow is healthy.
Bone scan
This diagnostic test can be used to check for cancer that has spread to the bones, skeletal pain that can't be explained, bone infection or a bone injury.
Bone spurs
Joint damage due to osteoarthritis is the most common cause of these bony growths.
Breast MRI
Learn more about how this imaging test helps diagnose cancer and when it's used.
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