Nutritional supplements
Learning Center
Pain and depression: Is there a link?
Depression can cause unexplained physical symptoms, such as headaches. Chronic pain can cause problems that lead to depression, such as poor sleep.
Ocular rosacea
Learn about symptoms, causes and treatments of ocular rosacea — an eye condition that often affects people who have skin rosacea.
Nervous breakdown: What does it mean?
Nervous breakdown isn't a medical term. It most often means a mental health crisis that affects your ability to meet your own needs and do daily tasks.
Nausea during pregnancy: A good thing?
Morning sickness is common during pregnancy. Understand what nausea and vomiting might mean while you're pregnant.
Nausea and vomiting
Motion sickness and drinking alcohol are among the many common causes of nausea and vomiting. Serious diseases can also have this effect.
Mumps
Find out more about the symptoms and treatment of this viral illness and how vaccines can prevent it.
Multivitamins: Do young children need them?
Multivitamins: Are they good insurance for young children?
Multiple sclerosis: Can it cause seizures?
Seizures occur more often in people with multiple sclerosis than in the general population.
Mucus in stool: A concern?
Visible mucus in stool can have a variety of causes, but they're not always serious.
Ministroke vs. regular stroke: What's the difference?
The term "ministroke" typically refers to a transient ischemic attack.
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