Morning nausea can come from many causes. It has a singular and easily remedied cause in the overwhelming majority of cases. Morning nausea is usually caused by simple dehydration. Many factors can contribute to such dehydration, including snoring. Alas, the cure to most cases of morning nausea is a cold glass of water. If there are other stomach problems, such as indigestion or heartburn, then precede the water with apple cider vinegar. Of course, morning nausea can sometimes indicate a health condition, but if the water and the apple cider vinegar are enough to remedy it, then it was merely dehydration.