Viral Infections

• A virus may be responsible for these symptoms. Severity can range from minor to very serious.
  
  

Food Poisoning

• Bacteria in food that has expired or that has not been well prepared can often cause the stomach to react with diarrhea and sometimes vomiting.
  
  

Medication Side Effects

• Some medications can irritate the stomach. These side effects should be listed on the medication container, and symptoms should not be severe.
  
  

Bowel Disorder

• Sometimes a medical disorder in the bowels can cause diarrhea. If you think you might be suffering from a disorder within your intestines, talk to a doctor about what can be done.
  
  

Traveling

• Drinking the water from other geographical areas may cause sudden diarrhea. This is because bacteria in the water may be unfamiliar to you.