Repeated vomiting with poor intake points to dehydration or illness; use safe rehydration now and get urgent care for red-flag signs.
You’re sick to your stomach, food won’t stay down, and sipping water feels like a chore. This guide gives you quick clues to common causes, clear steps to feel steadier, and the signs that mean it’s time to see a doctor fast.
Why You Keep Vomiting And Can’t Keep Food Down — Common Causes
“Throwing up” is a reflex that clears the stomach. Short bursts often come from a viral gut bug, spoiled food, or motion sickness. Ongoing bouts can stem from migraine, medicines, pregnancy, reflux flare-ups, gallbladder trouble, bowel blockage, or slow stomach emptying. A small share link to head injuries, high pressure inside the skull, or heart issues. If you’re older, pregnant, or have long-term conditions, you can slip into dehydration faster.
Broad Patterns You Can Match To Your Symptoms
Use the table as a fast lens. It doesn’t replace care, but it helps you sort next steps.
| Likely Cause | What It Feels Like | Quick Clue |
|---|---|---|
| Viral “stomach bug” (norovirus) | Sudden vomiting, watery stool, cramps, low fever, chills | Hits hard within hours; spreads through families, schools, cruise ships |
| Food poisoning (toxins or bacteria) | Nausea, vomiting, cramps, sometimes fever | Starts within hours of a risky meal; others who ate it may be sick |
| Medication side effect | Queasy soon after doses | New drug, higher dose, or pain pills/antibiotics/cannabis |
| Pregnancy (morning sickness) | Nausea on waking, smell-triggered waves | Missed period; worse in the first trimester |
| Migraine | Throbbing head pain, light/sound sensitivity | Queasy peaks with head pain; motion worsens it |
| Reflux or gastritis | Burning chest/upper belly, sour taste | Spicy/fatty meals or alcohol set it off |
| Gallbladder flare | Right-upper belly pain after fatty food | Pain may shoot to back or right shoulder |
| Bowel blockage | Crampy belly, no gas or stool, belly swelling | Severe pain, greenish or fecal-smelling vomit |
| Slow stomach emptying | Early fullness, bloating, nausea | Diabetes or long-term nerve issues |
| Head injury or high pressure in skull | Headache, vision changes, morning vomiting | Recent fall, new neurologic symptoms |
Red-Flag Signs That Need Same-Day Care
Get urgent care or go to the ER if any apply:
- Blood or coffee-ground material in vomit, black or bloody stool.
- Severe or steadily worsening belly pain, rigid belly, or chest pain.
- High fever, stiff neck, bad headache, confusion, fainting, or trouble breathing.
- No urine for 8–12 hours, dark urine, racing heart, fast breathing, or dizziness on standing.
- Green (bilious) vomit or signs of blockage: no gas or stool, swollen belly.
- After a head injury, new vision changes, weakness, or slurred speech.
- You’re pregnant and can’t keep fluids down for a day, or you lose weight.
- Age over 65, kidney/heart disease, diabetes using insulin, transplant, or chemo.
First Aid: Rehydrate The Smart Way
Fluids come first. Start with slow sips and build up. The goal is light-yellow urine and a steady pulse.
How To Sip Without Triggering Another Wave
- Rest the stomach for 30–60 minutes after a big episode.
- Begin with ice chips or 1–2 teaspoons of liquid every 3–5 minutes. If that sits well, double the amount every 15–20 minutes.
- Use an oral rehydration drink with glucose and salt. Clear soda, straight juice, or plain water alone won’t replace salts.
- If cramps ease and you’re peeing, widen the sips. If the waves return, step back to tiny amounts.
What To Drink And How Much
Targets vary by size and sweat loss. This table gives ballpark ranges.
| Option | How To Use | Notes |
|---|---|---|
| Oral rehydration solution (ORS) | 2–4 oz every 15–20 min, then 6–8 oz hourly | Balanced salts + glucose for absorption |
| Half-strength juice + pinch of salt | 2–4 oz sips; alternate with water | Sweeter drinks may worsen waves |
| Broth | Warm, small sips | Replaces sodium; skim fat if greasy |
Food Reboot: What To Eat When You’re Ready
Once liquids stay down for 4–6 hours, try light foods:
- Dry toast, crackers, pretzels, plain rice, applesauce, bananas, plain potatoes.
- Small portions, every 2–3 hours. Chew well. Stop before you feel full.
- Avoid heavy fat, spicy dishes, alcohol, and big dairy portions at first.
Protein helps steady blood sugar once queasiness fades. Add eggs, yogurt, tofu, baked chicken, or lentils as you improve.
Simple Home Measures That Calm Nausea
- Fresh air, cool cloth to the neck, and steady breathing.
- Ginger tea or chews; some people like peppermint tea.
- Acupressure wrist bands can ease motion-linked waves.
- Rest in a half-upright position; avoid lying flat right after sipping.
Medicines: What Helps And When To Avoid
Over-the-counter choices can ease mild cases:
- Antiemetics by mouth (dimenhydrinate, meclizine): steady light queasiness. Can make you drowsy.
- Antacids or H2 blockers (famotidine): help when burning or sour taste hints at acid.
- Bismuth subsalicylate: mild diarrhea with nausea; skip if allergic to aspirin or on blood thinners.
Skip any pill if you can’t keep liquids down; call a clinician for dissolvable or rectal options. Kids, pregnant people, and older adults need extra care with dosing. If you take insulin or sulfonylureas and can’t eat, speak with your diabetes team about dose changes to avoid low sugar.
Hygiene: Stop The Spread
Many cases come from a gut virus that passes fast from person to person. Wash hands with soap and water after the restroom and before food prep. Clean counters, taps, and door handles with a disinfectant labeled for norovirus. Stay home until you’ve been free of vomiting and diarrhea for at least 48 hours.
Read more on prevention in the CDC’s norovirus overview.
When Home Care Isn’t Enough
If you still can’t keep liquids down after 12–24 hours, or signs of dehydration show up, you may need IV fluids and tests. A clinician may check electrolytes, blood sugar, pregnancy status, or drug levels, and may order imaging if belly pain is severe.
For UK readers, see the NHS page on vomiting in adults for local steps and urgent care triggers.
Special Situations That Change The Plan
Pregnancy
Morning sickness can be mild, or it can be hard to manage. Weight loss, dark urine, or no urine points to dehydration and needs care. Vitamin B6, doxylamine, and dietary tweaks are common first steps from a clinician. If nothing stays down, ask about dissolvable or IV options.
Young Children
Kids lose fluid fast. Offer an oral rehydration drink by teaspoon every few minutes and advance slowly. Keep an eye out for no tears, dry mouth, sunken eyes, or less wet diapers. Seek care sooner than you would for an adult.
Older Adults
Fluid shifts can tip blood pressure and kidney function. Track urine, weight, and dizziness. Bring a list of medicines to any visit; some nausea comes from drug mixes.
Diabetes
Nausea plus insulin or sulfonylureas can lead to low sugar; vomiting plus missed insulin can swing high. Check glucose more often. If you’re throwing up, sip carb-containing liquids. If ketones are positive, seek urgent care.
Food Poisoning Versus A Gut Virus
Foodborne illness often follows a risky meal, and others who ate it may be sick. Vomiting from norovirus can surge in schools, care homes, or cruise ships, with onset 12–48 hours after exposure. Both can be short-lived, but both can dry you out fast. The self-care plan is similar: steady rehydration, rest, and simple foods.
What A Clinician Might Do
- Assess hydration, belly tenderness, and signs of blockage.
- Check electrolytes, kidney function, blood counts, pregnancy test if relevant.
- Give antiemetics by IV, IM, or dissolvable forms.
- Order imaging if severe or focal pain suggests stones, blockage, or inflammation.
- Review medicines and cannabis use; adjust if a side effect fits.
DIY ORS: Simple Recipe
If you don’t have a commercial oral rehydration drink, you can mix a basic stand-in at home until you can buy one:
- 4 cups clean water
- 6 level teaspoons sugar
- ½ level teaspoon table salt
Stir until dissolved. Taste: it should be no saltier than tears. Chill it if that makes sipping easier. Use measured spoons; don’t guess.
Recovery Timeline And When To Resume Normal Eating
Many mild cases settle in 24–72 hours. Day one centers on fluids. Day two adds light carbs and small protein portions. By day three, most people can widen choices and portions. Ease back into coffee, spicy dishes, and alcohol later. If waves persist past three days, or pain and fever join in, set up a visit.
Practical Checklist
- Start tiny sips of an oral rehydration drink; aim for light-yellow urine.
- Add light foods once you hold fluids for 4–6 hours.
- Use OTC aids only if you can keep them down and they fit your health profile.
- Clean hands and hard surfaces to limit spread.
- Seek urgent care if red-flag signs show up at any point.