Cure an upset stomach with vinegar
An upset stomach will calm down if you sip quietly on a glass of very warm water, to which has been added 1 tablespoon honey and 1 tablespoon vinegar. This is also good for easing gas.
You can stop the discomfort of nausea or vomiting by placing a cloth wrung out of warm apple cider vinegar on the stomach. Replace with another warm cloth when it cools.