Nutrition basics
Learning Center
Eye twitching
Most people experience eye twitching now and then, but it's not always harmless. Find out when these spasms might mean something more serious.
Cough
Cough: Symptom — Your body's response when something irritates your throat or airways and possible causes of this symptom.
Blood clots
Blood clots: Symptom — Overview covers definition, possible causes of this symptom.
Neutropenia (low neutrophil count)
Neutropenia: Symptom — Overview covers definition, possible causes of a lack of certain white blood cells.
High red blood cell count
Learn the possible causes of too many oxygen-transporting cells.
High hemoglobin count
An above-normal level of hemoglobin in your blood usually occurs when your body needs more oxygen, often because you smoke or live at high altitude.
Dizziness: Symptom
What does it mean if you have bouts of dizziness? Learn about the many possible causes, and when to seek treatment.
Shortness of breath
Problems breathing can come on suddenly or last for weeks or longer. Most cases are due to heart or lung conditions, but there are many other causes.
Fatigue
Many conditions and lifestyle factors can cause this common symptom.
Nosebleeds
Nosebleeds: Symptom — Comprehensive overview covers definition, possible causes of nosebleeds.
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