Stomach flu can be especially dangerous to the frail elderly because of rapid dehydration caused by vomiting and diarrhea. Excessive vomiting or diarrhea should be carefully watched. Nausea, loss of appetite, and general abdominal pain is followed by pain in the lower right part of the abdomen. You have a fever of 102 degrees F or higher. After only liquids are used, diarrhea continues for more than two days.
Diarrhea is bloody or black.
Vomiting continues on and off for more than 12 hours without significant improvement. Choose crushed ice and sips of water for the first few hours. Drink clear liquids for the next 24 hours. No foods for the first 24 hours. Aspirin, ibuprofen, or acetaminophen for fever.