Vitamin D deficiency is common and is associated with risk factors like older age, certain medical conditions, and decreased ...

Chest pain can be a sign of a heart attack or other cardiac condition, but it can also be a symptom of problems related to: respiration digestion bones and muscles other aspects of physical and mental ...

An E.P.A. site listing the causes of climate change no longer includes the main one: human activity. The Environmental ...

Déjà vu is a bit of a mystery. Experts aren’t sure what causes the sensation of having experienced something before, but they have some compelling theories. “Déjà vu” describes the uncanny sensation ...

Medically reviewed by Jay N. Yepuri, MD Key Takeaways Liver inflammation, or hepatitis, can be caused by viruses, alcohol, or fatty liver disease.If untreated, liver inflammation can lead to cirrhosis ...

Christy Bieber has a JD from UCLA School of Law and began her career as a college instructor and textbook author. She has been writing full time for over a decade with a focus on making financial and ...

You can develop back pain for many reasons, but some causes are more common than others. Wear and tear on the bones that form your spine (called vertebrae), muscles, and other tissues in your back can ...

A blackout refers to a loss of consciousness or complete or partial memory loss. Possible causes of blackouts include epilepsy and drinking a large volume of alcohol. Some causes of blackouts ...

The causes of sleep apnea include age, excess weight, certain health conditions, specific medications, and even your body structure. It may also result from smoking, drinking alcohol, hormonal or ...

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There are many theories about the causes of addiction, the use and abuse of legal and illegal psychoactive substances. Biology, psychology, and social and cultural elements all play a role in the ...

In 2016, children and adolescents (1 to 19 years of age) represented a quarter of the total estimated U.S. population 1; reflecting relatively good health, they accounted for less than 2% of all U.S.