Drink Water Surprisingly, water actually helps flush extra fluid from your body (especially useful when you’ve got PMS). Try adding lemon, since citrus is thought to soothe your stomach. Skip the Soda Avoid carbonated beverages as much as possible. All the bubbles in your glass make their way into your belly. Eat Slowly Chow down on that salad too quickly and you can swallow too much air, which can fill your tummy. Don’t Chew Gum You may also take in excess air when you chew gum. Salt Lightly Read the nutrition label to see how much sodium is lurking in your food. The American Heart Association recommends less than one teaspoon of salt per day (23 mg sodium).