COVID-19 variants: What's the concern?
The virus that causes COVID-19 has changed over time, which has affected prevention, diagnosis and…
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Tests & Procedures
COVID-19 vs. flu: Similarities and differences
Coronavirus disease 2019 (COVID-19) and seasonal flu have many similarities and differences. Find out what…
繼續閱讀COVID-19: Who's at higher risk of serious symptoms?
Advanced age and some health conditions can raise the risk of serious COVID-19 (coronavirus disease…
繼續閱讀CPAP machines: Tips for avoiding 10 common problems
Making small adjustments to your CPAP machine can help you use it more comfortably.
繼續閱讀Cradle cap
Learn about the symptoms, treatments and home care tips for this short-lived type of seborrheic…
繼續閱讀Craniopharyngioma
Learn more about this noncancerous tumor that forms near the brain's pituitary gland, including diagnosis…
繼續閱讀Craniosynostosis
In this condition, one or more of the flexible joints between the bone plates of…
繼續閱讀Craniotomy
Learn what brain conditions are treated with this surgery that involves removing a piece of…
繼續閱讀Craving and chewing ice: A sign of anemia?
Craving and chewing ice (pagophagia) is often associated with iron deficiency with or without anemia.
繼續閱讀Creutzfeldt-Jakob disease
Learn what can put someone at risk of developing this rare brain disorder that causes…
繼續閱讀Crohn's disease
Learn about symptoms and treatment for this debilitating, but treatable, digestive condition.
繼續閱讀Crying baby: What to do when your newborn cries
Listening to a crying baby can take a toll on your emotions. Follow these tips…
繼續閱讀Cryoablation for cancer
Learn how cryoablation is used to treat a variety of cancers, including bone, kidney, lung…
繼續閱讀Cryoglobulinemia
When atypical proteins in the blood clump together at temperatures below 98.6 F (37 C),…
繼續閱讀Cryotherapy for prostate cancer
Find out how very cold temperatures are used to freeze tissue and treat prostate cancer….
繼續閱讀CSF leak (Cerebrospinal fluid leak)
Cerebrospinal fluid leaks may start in the brain or spine, causing headaches, dizziness and other…
繼續閱讀CT coronary angiogram
Learn about the risks and results of this imaging test that looks at the arteries…
繼續閱讀Curcumin: Can it slow cancer growth?
Some research suggests that curcumin may help prevent or treat cancer.
繼續閱讀Cushing syndrome
High levels of the hormone cortisol in your body cause this endocrine disorder. Learn about…
繼續閱讀Cutaneous B-cell lymphoma
Find out more about the symptoms, diagnosis and treatment of this type of non-Hodgkin lymphoma.
繼續閱讀Cutaneous T-cell lymphoma
Learn about this type of non-Hodgkin lymphoma that attacks the skin. Find out about symptoms,…
繼續閱讀Cuts and scrapes: First aid
Following guidelines to care for minor cuts and scrapes can help you avoid infection and…
繼續閱讀Cuts of beef: A guide to the leanest selections
Whether you're watching your health or your weight, you can still enjoy this type of…
繼續閱讀Cyclic vomiting syndrome
This condition often starts in childhood and is marked by spells of vomiting several times…
繼續閱讀Cyclothymia (cyclothymic disorder)
Also called cyclothymic disorder, this mood disorder causes emotional ups and downs that are less…
繼續閱讀Cystic fibrosis
This condition, passed down in families, causes damage to the lungs, digestive system and other…
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