When a child starts vomiting and has loose stools a few hours after a meal, or when others who ate the same food become sick, food poisoning is a possibility. Children lose fluids quickly, so knowing how to check on them matters.
Why It Happens
Food poisoning, or foodborne illness, comes from eating or drinking something contaminated with bacteria, viruses, parasites or their toxins. Common routes include undercooked meat and eggs, food left at room temperature too long, and cross-contamination from unwashed hands or utensils. Vomiting and diarrhea are the body’s way of clearing harmful material, but they also drain fluid fast.
How It Differs by Age and Stage
Onset ranges from a few hours to a few days depending on the cause. Illness caused by a toxin can start with vomiting within hours of eating, while bacterial infections may bring diarrhea and cramps a day or more later. Vomiting and loose stools can quickly lower body fluid levels in infants and children, and severe dehydration can lead to seizures or drowsiness from electrolyte imbalance. Babies under 12 months can dehydrate especially quickly and benefit from earlier medical advice. Most cases improve within a few days.
What to Do at Home
The core of care is replacing fluids. CDC lists dehydration signs as little or no urine, very dark urine, intense thirst, dry mouth or throat, dizziness and crying without tears, and notes that dehydration can happen quickly in young children; it recommends extra fluids such as oral rehydration solution. When vomiting is present, give a spoonful or small sips every 5-10 minutes rather than a large drink. Breastfed and formula-fed babies can keep feeding while the lost fluid is replaced. Sports drinks are high in sugar and some pediatric sources suggest mixing them half and half with water. KidsHealth advises not giving over-the-counter anti-diarrhea medicine to children. Handwashing after the toilet and before meals reduces spread to the rest of the family.
Common Misunderstandings
One is that a vomiting child should have nothing to drink; small, frequent sips actually help prevent dehydration. Another is that diarrhea must be stopped quickly, though it can be the body clearing the germ, so medicine to stop it is not recommended without a doctor. A third is that antibiotics speed recovery; they are used selectively and do not work on viruses. A fourth is concluding it is not the food because you feel fine after eating the same meal, since the amount eaten and each person’s immunity differ.
When to Seek Care
Call the doctor if vomiting lasts more than 12 hours, if diarrhea comes with a fever above 101 degrees Fahrenheit (38.3 degrees Celsius), or if there is blood or mucus in the stool or blood in the vomit. Children with chronic health conditions and babies under 12 months should be seen earlier. Go to the emergency room right away if your child cannot keep any fluids down, has gone 6-8 hours or more without urinating, has a very dry mouth and no tears, is limp or hard to wake, has a seizure, or has severe belly pain and will not let you touch the abdomen. This information is based on U.S. and international sources; if you live elsewhere, check with a local pediatrician. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.