Food Poisoning
Informed by recognized medical guidance
If symptoms are severe, worsening, or life-threatening, seek urgent medical care now.
Overview
Food poisoning is an illness you get from eating or drinking something contaminated with harmful germs, such as bacteria, viruses, or parasites. It can also be caused by toxins (poisons) produced by germs in food.
Key facts
- Most people get better within a few days without needing medical treatment.
- Symptoms usually start within a few hours to a few days after eating the contaminated food.
- Simple steps like washing your hands and cooking food properly can prevent most cases.
Yes, food poisoning is very common. Millions of people worldwide get it each year.
Anyone can get food poisoning, but young children, older adults, pregnant people, and those with weakened immune systems are more likely to have severe symptoms.
Symptoms
- Blood in vomit or stool (poop)
- High fever (over 101°F or 38.3°C) that does not come down
- Signs of severe dehydration: very dry mouth, no urine for 12 hours, dizziness when standing
- Inability to keep any liquids down (vomiting everything)
- Severe abdominal (belly) pain that does not go away
- ⚠Symptoms lasting more than 3 days without improvement
- ⚠Diarrhea that contains blood or pus
- ⚠Fever lasting more than 2 days
- ⚠Symptoms in a baby, young child, older adult, or person with a weak immune system
Common symptoms
- Nausea
- Vomiting
- Diarrhea (often watery or bloody)
- Stomach cramps
- Fever
- Headache
- Weakness or tiredness
Symptoms in children
- All the common symptoms above, plus:
- Dry mouth and tongue (signs of dehydration)
- No tears when crying
- Sunken eyes or cheeks
- Extreme fussiness or drowsiness
Symptoms in older adults
- All the common symptoms, but dehydration can happen faster. Signs include:
- Confusion or trouble thinking clearly
- Dizziness or feeling faint
- Not urinating much (dark urine)
- Very dry mouth and skin
Causes
Main causes
- Bacteria such as Salmonella, E. coli, Campylobacter, and Listeria
- Viruses like norovirus and hepatitis A
- Parasites such as Giardia or Cryptosporidium
- Toxins (poisons) made by bacteria that grow on food, like Staphylococcus aureus or Bacillus cereus
Risk factors
- Eating raw or undercooked meat, poultry, eggs, or seafood
- Drinking unpasteurized (raw) milk or juices
- Eating unwashed fruits and vegetables
- Preparing food with dirty hands or utensils
- Traveling to areas with poor sanitation or food safety standards
- Having a health condition that weakens the immune system
When to see a doctor
See a doctor urgently if:
- Blood in your stool or vomit
- High fever that lasts more than a day
- Signs of dehydration (dry mouth, little or no urine, dizziness)
- Severe stomach pain that does not go away
Book a routine appointment if:
- Mild symptoms that last longer than 2 to 3 days
- Diarrhea that keeps you from doing normal activities
- You are pregnant, over 65, or have a weak immune system
Diagnosis
Your doctor will ask about your symptoms, what you ate recently, and whether anyone else who shared your food is sick. They will also check for signs of dehydration.
Tests that may be done
- Stool (poop) sample test to find the specific germ causing the illness
- Blood test if you have a high fever or signs of a serious infection
What to expect at your appointment
Many people do not need any tests. If your symptoms are mild, your doctor may simply recommend rest and fluids. If the illness seems more serious or lasts a long time, tests can help guide treatment.
Treatment
Most cases of food poisoning can be managed at home with rest and plenty of fluids. The goal is to prevent dehydration and let your body fight off the infection.
Self-care at home
- Drink clear fluids often — water, clear broths, or oral rehydration solutions (available at pharmacies)
- Eat bland foods when you feel ready, such as crackers, toast, bananas, or rice
- Avoid dairy, fatty, spicy, or very sugary foods until you feel better
- Get plenty of rest
Medical treatments
If you become severely dehydrated or have a serious infection, you may need to go to the hospital for fluids given through a vein (IV). In some cases, doctors may prescribe antibiotics for certain bacterial infections. Antidiarrheal medicines are not always recommended — check with your doctor before taking them.
When is surgery considered?
Surgery is very rarely needed for food poisoning. It may be considered only if there is a serious complication, such as a hole in the intestine or an abscess (a pocket of infection).
Living with this condition
While you are sick, stay home and rest. Drink small amounts of fluids often. Avoid preparing food for others until you have been symptom-free for at least 48 hours (2 days).
Lifestyle tips
- Wash your hands thoroughly with soap and water after using the bathroom, before eating, and before handling food
- Clean kitchen surfaces and utensils with hot, soapy water
- Stay away from work, school, or childcare until symptoms stop
Diet and exercise
Start with light foods like crackers or toast. Slowly add other foods as you feel better. Drink plenty of water. Avoid strenuous exercise until you are fully recovered, as your body needs energy to heal.
Mental health and emotional wellbeing
Being sick with food poisoning can be stressful and uncomfortable. You may worry about dehydration or passing the illness to others. Remember that most people recover quickly. If you feel very anxious about your symptoms or have trouble coping, talk to your doctor or a trusted health professional.
Prevention
Yes, food poisoning can often be prevented by following good food safety practices. This includes washing hands, cooking food to safe temperatures, storing food properly, and avoiding cross-contamination between raw and cooked foods.
Vaccines
There are vaccines for some germs that can cause food poisoning, such as hepatitis A and typhoid fever. Talk to your doctor about whether these are recommended for you, especially if you travel to certain countries.
Complications
If left untreated
- Severe dehydration, which can harm kidneys and other organs
- Spread of infection to the bloodstream (sepsis), which is life-threatening
- Long-term digestive problems, such as irritable bowel syndrome (IBS)
- In rare cases, kidney failure (for example, from certain types of E. coli)
Long-term outlook
The outlook for food poisoning is very good. Most people recover fully within a few days to a week with rest and fluids. Even in more serious cases, prompt medical care leads to a full recovery. Serious complications are rare, and you can take steps to lower your risk.
Find support
International organisations
- World Health Organization (WHO) – Food Safety ↗
- Centers for Disease Control and Prevention (CDC) – Food Poisoning ↗
Local organisations
- NHS – Food Poisoning ↗ · United Kingdom
- CDC – Food Safety ↗ · United States
- Food Standards Agency (UK) ↗ · United Kingdom
Helplines
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Guidance may differ by country or region. Confirm local recommendations with a qualified healthcare provider.