You’ve probably had an upset stomach. Most likely it was due to something you ate. But imagine bleeding from your stomach. That’s a little different than your stomach just being upset. Stomach ulcers can be very serious.
Many diseases can affect the digestive system. Three of the most common diseases that affect the digestive system are food allergies, ulcers, and heartburn. Foodborne illnesses and food intolerance are also serious issues associated with the digestive system.
These foods are the most common causes of food allergies.