it can be very serious and gastroenteritis lasting more than a week really should be assessed by a physician. most food poisoning will resolve in a healthy adult within a week. if you go more than that you run the risk of throwing off electrolytes your body minerals; salt potassium magnesium and so on. you can suffer some cardiac events without the proper balance of minerals. if you have bloody diarrhea this should always be assessed by physician. blood in vomit could indicate an ulcer bowel movement with coffee grind look indicates digested blood-ulcer or intestinal bleed. 3 weeks i'd call the doctor.
i have had gastroenteritis for three weeks now. is this serious? . i was diagnosed with the neuro virus. i have had the symptoms for going on three weeks now. i no longer had the diarrhea but still the nausea dizziness and stomach pain. how long does this last? do i have something to worry about? i am tired of being sick!