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Nausea

Nausea is associated with so many things that it can be hard to attribute it to reflux. But, says Dr. Coyle, "in some people, the only manifestation they have of reflux is nausea. If you have nausea and can't figure out why, one of the things [to] think about is reflux."

And if the nausea tends to come on right after meals, that's even more of an indication that it might be acid reflux. If so, a regular antacid treatment such as an over-the-counter acid-countering medicine could cut down on your discomfort.

Next: Extra saliva