- Get immediate medical care if you're knocked out, no matter how you feel
- Terrible head or abdominal pain could indicate a major problem
Maybe you've got a weird pain in your jaw or a searing headache. Maybe you simply don't feel right. When something is off in your body, you can't always tell whether it's worth it to call the doctor, let alone rush to the ER. "It's easy to say, 'Oh I'm young, I'm healthy, I can't be having an emergency, so why should I go in?'" says Megan Fix, MD, assistant professor at the University of Utah School of Medicine. But serious medical crises -- concussions, appendicitis, even a stroke -- can happen to healthy women of any age.