Summary:
- Digestive system diseases include food allergies, ulcers, and heartburn.
- Food allergies occur when the immune system reacts to substances in food as though they were harmful “foreign invaders” Foods that are most likely to cause allergies include nuts, eggs, grains and milk.
- Ulcers are sores in the lining of the stomach or duodenum that are usually caused by bacterial infections.
- Heartburn is a painful burning sensation in the chest caused by stomach acid backing up into the esophagus.