Viruses or a viral infection cause the stomach flu, and the primary difference between the stomach flu and the seasonal flu is the range in symptoms. The stomach flu is often characterized by vomiting, diarrhea, intense stomach pain, and cramping. People with the flu sometimes suffer from these symptoms, but it is rare.
The same virus does not cause the two, and Influenza is seasonal. The symptoms of the cold and flu include nonproductive cough, congestion, body aches and pains, fever, exhaustion, or fatigue. Most people recover rather quickly from the flu, and if caught early, there are medicines your doctor can prescribe to shorten the course. People who are suffering from the flu are often encouraged to drink plenty of fluids and rest.