Feeling dizzy, lightheaded, or suddenly blacking out may seem harmless in some situations, but doctors say fainting can sometimes signal serious underlying health problems.

Question: My 13-year-old daughter is very tall and faints a lot. Her body is changing, and I have told her that it is nothing ...

Adults aged 40 years or older presenting to the emergency department (ED) with presyncope (near-fainting) or syncope (fainting) had similar rates of 30-day serious cardiac outcomes (5.2% vs 4.7%), ...

Extremely rare medical condition, which caused a mother-of-two to black out when she ate, has been successfully treated using ...