2. Food Poisoning

One of the common causes of abdominal pain and upset stomach in people is food poisoning, an illness that comes from eating food contaminated with toxic agents or bacteria that come from unsanitary food handling and preparation techniques. Every year, approximately 48 million people in the United States suffer from food-borne illnesses, a staggering number considering that it can be prevented by following proper hygienic practices in the handling, cooking, and storage of food.