Heartburn isn--t just a minor inconvenience--it is very painful and can inhibit your sleep, affect your work, and make you feel miserable. Of course, if you are one of the 60 million Americans who get heartburn at least once a month, you already know this. Heartburn happens when the lining of the esophagus comes in contact with too much stomach juice, which can produce a burning pain and injure the esophagus. There is a valve that connects the end...