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Von Willebrand disease
Learn more about the symptoms, causes, diagnosis, treatment of this inherited bleeding disorder in which blood doesn't clot well.
Vomiting blood
Vomiting blood can be a symptom of a number of serious conditions. Find out what it could mean.
Voice disorders
Learn more about the causes of common voice disorders, such as laryngitis and granuloma, and how Mayo Clinic diagnoses and treats them.
Vocal cord paralysis
Find out more about this condition that happens when nerve signals that control the voice box are interrupted.
Vocal cord dysfunction: Is it a type of asthma?
Vocal cord dysfunction and asthma cause similar symptoms, but they're not the same. Find out the difference between the two.
Vitiligo
Learn more about this condition in which your skin loses pigment cells, resulting in very light or white patches on parts of the body.
Vitamins for MS: Do supplements make a difference?
Can vitamin supplements improve MS symptoms?
Vitamin deficiency anemia
A lack of folate and vitamin B-12 can cause a type of anemia in which red blood cells become too large and can't carry oxygen properly.
Vitamin D toxicity: What if you get too much?
Understand the risks of too much vitamin D, including a toxic reaction.
Vitamin D deficiency: Can it cause high blood pressure?
Too little vitamin D is bad for the bones, but what about the heart? Learn how a low vitamin D level may affect blood pressure.
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