what causes you to have awful gas
Fiber supplements containing psyllium, such as Metamucil, may cause such problems, especially if added to your diet too quickly. Carbonated beverages, such as soda and beer, also cause gas. Other causes of excess gas include: 1  Swallowed air. 2  You swallow air every time you eat or drink. 3  You may also swallow air when you're nervous, eat too fast, chew gum, suck on candies or drink through a straw. 4  Some of that air finds its way into your lower digestive tract. 5  Another health condition.