Fitness basics
Learning Center
Melatonin side effects: What are the risks?
Melatonin is generally safe for short-term use but can cause side effects.
Mononucleosis: Can it recur?
Mono can return in some rare cases. Learn why that happens.
Multivitamins: Do young children need them?
Multivitamins: Are they good insurance for young children?
Neti pot: Can it clear my nose?
Learn more about this container designed to rinse debris or mucus from the nasal cavity.
Ozone air purifiers: Can they improve asthma symptoms?
Ozone air purifiers don't reduce asthma symptoms. In fact, they can make asthma worse.
PSA levels: Can they rise after partial prostate removal?
A number of factors can cause PSA levels to rise after surgery for an enlarged prostate.
Penis fracture: Is it possible?
Know the signs and symptoms of a penis fracture.
Petroleum jelly: Safe for a dry nose?
Rarely, inhaling petroleum jelly for prolonged periods can cause lung inflammation (lipoid pneumonia).
Pink eye: How long is it contagious?
Many parents wonder how long pink eye (conjunctivitis) is contagious. Find out.
Prostate cancer metastasis: Where does prostate cancer spread?
Prostate cancer can spread (metastasize) just about anywhere in the body, but it's most likely to spread to the lymph nodes and bones.
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