After you throw up, the most important things are to rest your stomach, rehydrate slowly, and protect your teeth. Most vomiting episodes from stomach bugs or food reactions resolve on their own within a day or two, but how you handle the first few hours makes a real difference in how quickly you recover.
Rest Your Stomach First
Your instinct might be to drink a big glass of water right away, but your stomach needs a short break. Wait a couple of hours before eating or drinking anything substantial. If you try to gulp fluids immediately, you risk triggering another round of vomiting. Lie down or sit still, and let the nausea settle before you reach for anything.
Rinse Your Mouth, but Don’t Brush
Stomach acid is strong enough to dissolve tooth enamel, and vomiting coats your teeth in it. The natural response is to grab a toothbrush, but brushing right away actually scrubs that acid deeper into softened enamel. Instead, rinse your mouth with plain water or a baking soda rinse (about half a teaspoon in a glass of water) to neutralize the acid. Wait at least 30 minutes before brushing. This gives your enamel time to reharden.
How to Start Drinking Again
Once a couple of hours have passed and your nausea has eased, start with ice chips or very small sips of water every 15 minutes. The key word is small. An ounce or two at a time is plenty. If that stays down, you can gradually increase the amount over the next few hours.
Plain water works fine for most adults with mild dehydration. If you’ve been vomiting repeatedly or also have diarrhea, an oral rehydration solution (like Pedialyte or a similar product) replaces lost sodium and potassium more effectively than water alone. For mild cases, diluted apple juice is also a reasonable option. A Harvard-affiliated study of about 600 children with stomach flu found that kids given dilute apple juice actually did better than those given a standard electrolyte solution, likely because they were more willing to drink it. The takeaway: getting fluids in is more important than getting the perfect fluid.
Avoid coffee, tea, sodas with caffeine, and full-strength fruit juice while you’re still recovering. Caffeine can irritate your stomach, and drinks with a lot of sugar can worsen diarrhea.
When to Start Eating
There’s no need to starve yourself. Once you’re keeping liquids down comfortably, you can start with small amounts of bland food. The old advice was to stick strictly to bananas, rice, applesauce, and toast, but current guidelines are more flexible. You can eat a wider range of gentle foods, including:
- Broth or simple soups
- Crackers or plain bread made with white flour
- Potatoes (boiled or baked, not fried)
- Applesauce, bananas, or canned fruit
- Eggs
- Lean chicken or whitefish, steamed or baked
- Popsicles or gelatin
The goal is soft, low-fiber, low-fat food that won’t challenge your digestive system. Eat small portions and see how you feel before eating more.
Foods and Drinks to Avoid
For at least a day or two after vomiting, steer clear of anything that’s hard on your stomach. High-fat foods like fried chicken, pizza, and fast food slow digestion and can trigger more nausea. Spicy foods irritate an already-sensitive stomach lining. Dairy is worth avoiding too. When your gut is inflamed, it can temporarily lose some of its ability to digest lactose (the sugar in milk), and this difficulty can last a month or more after a stomach virus. If milk or cheese seems to make things worse, that’s why.
If You Vomited After Taking Medication
This is a common worry, and unfortunately there are no universal guidelines. The general rule most clinicians follow: if you threw up within 30 minutes of taking a pill, it probably didn’t have time to absorb, and retaking the dose is reasonable. If more than 60 minutes passed and you didn’t see pill residue in the vomit, the medication likely made it through your stomach. For anything in between, or for medications where the dose really matters (like birth control, seizure drugs, or blood thinners), call your pharmacist or doctor before redosing.
Rehydration for Children
Kids dehydrate faster than adults, so fluid replacement matters even more. Give small amounts at a time: an ounce or two, then wait and see if it stays down before offering more. For children with mild dehydration, almost any fluid they’ll actually drink is better than the “ideal” fluid they refuse. Diluted juice, popsicles, and oral rehydration solutions all work. If your child won’t drink anything or seems to be getting worse, that’s a sign to call your pediatrician.
For infants under 12 months, continue breastfeeding or formula feeding in small, frequent amounts. Breast milk is well tolerated even during stomach illnesses.
Signs That Need Medical Attention
Most vomiting runs its course without needing a doctor. But certain symptoms alongside vomiting signal something more serious. Call 911 or go to an emergency room if vomiting comes with chest pain, severe abdominal cramping, confusion, blurred vision, or a high fever with a stiff neck. Vomit that contains blood, looks like coffee grounds, or has a fecal odor also warrants emergency care.
Head to urgent care if you have a severe headache you’ve never experienced before, or if you’re showing signs of significant dehydration: very dark urine, dry mouth, dizziness when you stand up, or feeling weak and lightheaded.
For adults, vomiting that continues beyond two days deserves a doctor’s visit. For children under two, the threshold is 24 hours. For infants, it’s 12 hours. And if you’ve had recurring episodes of nausea and vomiting lasting more than a month, or you’ve lost weight without trying, bring it up with your doctor even if each individual episode seems mild.