Gastrointestinal flu primarily manifests symptoms of both the common cold and the gastrointestinal tract, predominantly with gastrointestinal symptoms, accompanied by symptoms of a cold, such as fever, headache, dizziness, and general body aches. The gastrointestinal symptoms mainly include vomiting, diarrhea, nausea, and abdominal pain. Severe diarrhea and vomiting can lead to significant loss of electrolytes and water in the body, causing shock and electrolyte imbalances. This may present as shock, sweating all over the body, profuse sweating, pale complexion, and arrhythmias, among others.