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Heartburn or heart attack: When to worry

What's the best thing to do if you have chest pain and you're not sure what's causing it?

If you have persistent chest pain and you aren't sure it's heartburn, call 911 or emergency medical help.

Call your doctor if you had an episode of unexplained chest pain that went away within a few hours and you did not seek medical attention. Both heartburn and a developing heart attack can cause symptoms that subside after a while. The pain doesn't have to last a long time to be a warning sign.