Christopher Kelly, MD, a physician at Columbia University Medical Center in New York City. His research has been published in The New England Journal of Medicine and other professional journals. He is coauthor, with Marc Eisenberg, MD, of Am I Dying?!: A Complete Guide to Your Symptoms—and What to Do Next.
If you’re overcome by light-headedness, a headache or fatigue, here’s how to know if it’s a red flag for something serious…
