This document discusses three common digestive system diseases: food allergies, ulcers, and heartburn. Food allergies cause the immune system to react to certain foods, resulting in symptoms like vomiting, diarrhea, swelling of the lips and mouth, and in rare cases anaphylaxis. Ulcers are sores in the stomach or duodenum caused by bacterial infections or acidic stomach environments that damage the stomach lining, causing abdominal pain and bleeding. Heartburn is a painful burning sensation in the chest caused by stomach acid backing up into the esophagus, which can damage the esophagus if left untreated.

1. Digestive system diseases

2. What's
worse than
an upset
stomach?

3. Food allergies
-occur when the
immune system
reacts to
substances in
food as though
they were
harmful “foreign
invaders.”

4. Food allergies
Symptoms of food allergies often
include vomiting and diarrhea.
Symptoms of food allergies include
itching and swelling of the lips and
mouth. More serious symptoms
include trouble breathing. In some
instances, a food allergy can trigger
anaphylaxis, which is an extremely
severe reaction.
Emergency medical treatment is
critical for this condition, which left
untreated, can lead to death.

5. Ulcers
• are sores in the lining of
the stomach or
duodenum that are
usually caused by
bacterial infections.
• They may also be
caused by the acidic
environment of the
stomach. Stomach acids
may damage the lining of
the stomach. Symptoms
typically include
abdominal pain and
bleeding.

6. . The inside wall of the
stomach is protected
from the acid and
enzymes by a mucous
lining. Ulcers are caused
when there is an
imbalance between the
digestive juices
produced by the
stomach and the various
factors that protect the
lining of the stomach.

8. Heartburn
• is a painful burning sensation in the
chest caused by stomach acid
backing up into the esophagus. The
stomach acid may eventually cause
serious damage to the esophagus
unless the problem is corrected.