Steep 1 teaspoon of fresh or dried parsley in 1 cup of hot water. After five minutes, strain and slowly drink the parsley tea. Remember that parsley tea also acts as a diuretic, so make sure you plan accordingly, because you may have to "eat and run."

Slice one medium-sized onion and boil it in 1 cup of milk. Drink this concoction warm. It sounds awful and probably is, but it's an old home remedy that may work.

Water has amazing healing power. Get in a hot shower and let the water beat down on your stomach for 10 to 15 minutes. By the time you dry off, you should be feeling a lot better.

American Indians used this one for stomachaches-pour 1 cup of boiling water over 1 teaspoon of cornmeal. Let it sit for five minutes. Add salt to taste and drink slowly.

Go for a light walk: If you have had a sumptuous meal and are feeling full, take a light walk. Light exercise especially walking has been shown to increase the rate at which the digested foods move through the bowels. This allows the stomach to empty faster, thus reducing stomach cramps.

Choose noncaffeinated drinks: Coffee and colas worsen the condition of the tense stomach. Instead, choose water, fruit juices or herbal teas for drinking.
Prevention
Quit smoking.
Lose weight if you need to.
Exercise regularly.
Finish eating at least 2 hours before you go to bed.
Eat small meals more frequently.
After eating, stay upright for at least 30 minutes.
Elevate the head of your bed.