Gastrointestinal colds and gastroenteritis generally have similar symptoms. Gastrointestinal colds are caused by viral infections or heatstroke, causing mild fever, runny nose, mild nausea, diarrhea, etc., typically without substantive white blood cells or pathogens in the stool. Gastroenteritis, on the other hand, involves actual pathological changes in the gastrointestinal tract, such as from Helicobacter pylori or E. coli infections, and usually does not cause fever, runny nose, or other complications. Typical symptoms include intermittent abdominal pain, diarrhea, nausea, vomiting, and other digestive system symptoms.