Should You Go to the ER?
Go to the ER if you have: A blow to the head
...that results in loss of consciousness, a seizure, or vomiting (especially if you vomit more than once), even if it happens a few hours after you hit your head.
Go to the ER if you have: Any loss of consciousness or fainting
...even if you think it’s just because you haven’t eaten all day. It might be nothing, but it could also signal a heart or circulation problem or even a stroke. "There’s no way to determine the cause on your own," says emergency physician Richard O’Brien, MD, an associate professor in the division of medicine in the department of clinical sciences at the Commonwealth Medical College of Pennsylvania.
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