Get to an emergency room if there is blood in the vomit, if nothing has stayed down for more than a day, if vomiting comes with severe abdominal pain, a stiff neck, a severe headache, chest pain, confusion, or a recent head injury — or if there are signs of dehydration. Most vomiting is a short-lived illness that resolves at home. A small fraction is the visible part of something serious.
Emergency signs
Come in now for any of these:
- Blood in the vomit, or material that looks like coffee grounds
- Green or bright yellow bile with abdominal pain and no bowel movements — possible obstruction
- Severe or worsening abdominal pain, or a rigid abdomen
- Vomiting after a head injury, especially repeated vomiting, drowsiness, or confusion
- Severe headache or a stiff neck with fever — possible meningitis
- Chest pain, breathlessness, or sweating — heart attacks can present as nausea and vomiting, particularly in women and people with diabetes
- Confusion, extreme drowsiness, or difficulty waking
- Signs of dehydration: no urine for 8 or more hours, dizziness on standing, very dry mouth, sunken eyes, rapid heartbeat
- Unable to keep any fluid down for 24 hours (adults), 12 hours (children), or 8 hours (infants)
- Diabetes plus vomiting — this can be diabetic ketoacidosis, which is a genuine emergency. Check ketones if you can, and come in.
- Pregnancy with severe, persistent vomiting — hyperemesis needs treatment, not endurance
- Suspected poisoning or overdose — call Poison Control at 1-800-222-1222 and come in
- A forceful, projectile pattern in a young infant — needs same-day assessment
Why dehydration is the real risk in Arizona
Vomiting itself rarely harms you. Losing fluid does — and in a climate where you are already losing water through your skin and breath without noticing, the margin is thinner here than almost anywhere else in the country.
A stomach bug that would be a miserable 48 hours in a temperate state can put someone in our emergency room needing intravenous fluids in an Arizona July. This is especially true for:
- Infants and young children, who have small fluid reserves
- Adults over 65, who feel thirst less reliably and are often on diuretics or blood pressure medication
- Anyone on diuretics, ACE inhibitors, or SGLT2 diabetes medications
- People who were already dehydrated — after a hike, a round of golf, or yard work in the heat
Managing it properly at home
When there are no red flags, the goal is small and frequent, not big and hopeful.
Wait about 30 minutes after vomiting, then start with a tablespoon of fluid every 10 minutes. Volume is what triggers more vomiting, so a large glass of water is counterproductive even though it is what you want.
Use an oral rehydration solution — Pedialyte or an equivalent — rather than sports drinks, which are too sugary and too low in sodium to rehydrate properly. Excess sugar can worsen diarrhoea. Flat ginger ale is not rehydration.
Ice chips or ice lollies work well for children who refuse to drink.
Reintroduce food gradually once fluids are staying down for a few hours: plain, starchy, low-fat. Bland is not a superstition here — fat slows stomach emptying.
Keep breastfeeding or formula-feeding infants, in smaller amounts more often, and ask us before giving anything else.
Skip the anti-diarrhoeal medicines unless a clinician advises them, particularly with a fever or bloody stools — slowing the gut can keep an infection in place. And do not give aspirin to children or teenagers.
Wash hands properly. Norovirus is not reliably killed by alcohol gel; soap and water matter, and so does not preparing food for others for 48 hours after symptoms stop.
Food poisoning versus a stomach virus
People want to know which one they have. Honestly, it rarely changes what you do.
Food poisoning tends to arrive faster — often within 1 to 6 hours of the meal — hits hard, and eases within a day. A viral gastroenteritis usually takes 12 to 48 hours to appear, often spreads through a household, and lasts one to three days. Both are managed the same way: fluids, rest, and watching for the red flags above.
The exceptions that matter: bloody diarrhoea, a fever above 102°F (39°C), symptoms lasting more than three days, or any neurological symptoms such as blurred vision, tingling, muscle weakness, or difficulty swallowing. That last group can indicate botulism or another serious infection and needs immediate care.
What we can do for you
At our Emergency Room, a patient who cannot stop vomiting usually starts feeling human again fairly quickly:
- Intravenous fluids to rehydrate properly
- Anti-sickness medication given by injection or IV, which works when tablets will not stay down
- Blood tests on site — kidney function, electrolytes, blood sugar, ketones, blood counts
- CT or ultrasound imaging if we are ruling out obstruction, appendicitis, or gallbladder disease
- An ECG where a cardiac cause is possible
When the clinic is right
Book at our Medical Clinic for nausea that is ongoing but not dangerous: reflux, recurrent morning nausea, medication side effects, suspected food intolerance, or a bug you are keeping ahead of but want reviewed. Same-day appointments are usually available on (602) 671-7981.
Where to go
Call 911 for vomiting with chest pain, confusion, a seizure, or after a serious head injury.
Come to our Emergency Room — 9700 N. Saguaro Blvd, open 24 hours, no appointment — for blood in the vomit, severe pain, dehydration, diabetes with vomiting, or nothing staying down. ER: (602) 671-7990.
Poison Control: 1-800-222-1222, free and staffed 24 hours.
Related reading
- Severe Abdominal Pain: When It’s More Than a Stomach Ache
- Signs of Dehydration in Children and Adults: An Arizona Parent’s Guide
- Food Allergies and Anaphylaxis: What to Do in the First Two Minutes
Sources
- CDC — Food poisoning symptoms
- CDC — Norovirus
- Mayo Clinic — Gastroenteritis
- FoodSafety.gov — When to see a doctor