Food Poisoning: Symptoms, Home Care, and When to Seek Medical Care
Food poisoning, also called foodborne illness, happens when you get sick from eating or drinking something contaminated with germs or toxins. It can be caused by bacteria, viruses, parasites, or chemicals. Symptoms can start quickly after eating, or they may take hours to days depending on the cause.
Most mild cases improve with fluids, rest, and time. However, food poisoning can sometimes cause dehydration or serious infection, especially in older adults, pregnant people, young children, people with chronic medical conditions, and people with weakened immune systems.
Common symptoms of food poisoning
Food poisoning symptoms may include:
Nausea
Vomiting
Diarrhea
Stomach cramps
Abdominal pain
Fever
Chills
Body aches
Headache
Fatigue
Loss of appetite
Diarrhea, stomach pain or cramps, nausea, vomiting, and fever as common food poisoning symptoms.
How soon do symptoms start?
Symptoms may begin within minutes to hours, or they may take several days depending on the germ or toxin involved. This is one reason it can be difficult to know exactly which food caused the illness.
Possible sources may include:
Undercooked meat, poultry, seafood, or eggs
Unwashed fruits or vegetables
Unpasteurized milk or juice
Food left out too long
Improperly stored leftovers
Cross-contamination from raw meat or poultry
Contaminated water
Food prepared by someone who is sick
What you can do at home
For mild symptoms, supportive care may include:
Sip fluids frequently
Use oral rehydration solution if diarrhea or vomiting is significant
Try ice chips or small sips if nauseated
Rest
Eat bland foods as tolerated
Avoid large heavy meals
Avoid alcohol
Avoid greasy, spicy, or very sugary foods
Wash hands often to prevent spreading illness
Clean bathroom surfaces and high-touch areas
Good food options as symptoms improve may include:
Crackers
Toast
Rice
Bananas
Applesauce
Soup or broth
Potatoes
Oatmeal
Plain noodles
Lean protein when tolerated
Hydration is the priority
The biggest concern with vomiting and diarrhea is dehydration. Dehydration is the most common complication of food poisoning, and people such as children, older adults, those with weakened immune systems, or people with other illnesses may be at higher risk.
Signs of dehydration may include:
Dry mouth or throat
Dizziness when standing
Very little urination
Dark urine
Weakness
Fast heart rate
Confusion
Inability to keep fluids down
Should you take anti-diarrhea medicine?
Some over-the-counter anti-diarrhea medicines may not be appropriate if you have fever, bloody diarrhea, severe abdominal pain, or suspected bacterial infection. Slowing diarrhea in some infections can make illness worse.
Ask a healthcare professional before using anti-diarrhea medicine if symptoms are severe, bloody, associated with fever, or you have significant medical conditions.
Do you need antibiotics?
Most food poisoning does not need antibiotics. Antibiotics are only used for certain bacterial or parasitic infections and may require testing or medical evaluation.
Antibiotics are not helpful for viral gastroenteritis and can sometimes cause side effects or worsen certain infections. A medical provider can help decide whether stool testing, antibiotics, or other treatment may be needed.
When to seek medical care
Contact a healthcare provider if you have:
Diarrhea lasting more than 3 days
Vomiting that prevents you from keeping liquids down
Fever over 102°F
Bloody diarrhea
Signs of dehydration
Severe abdominal cramping
Symptoms after eating recalled food
Symptoms after recent travel
Symptoms after eating raw seafood, undercooked meat, or unpasteurized foods
Pregnancy
Age over 65
Weakened immune system
Diabetes, kidney disease, heart disease, or other chronic conditions
Schedule an appointment to seek medical care for severe symptoms such as bloody diarrhea, diarrhea lasting more than 3 days, fever over 102°F, frequent vomiting that prevents keeping liquids down, or signs of dehydration.
When to seek urgent or emergency care
Seek urgent or emergency care for:
Severe dehydration
Fainting
Confusion
Severe weakness
Blood in stool or black/tarry stool
Severe or worsening abdominal pain
Persistent vomiting
Trouble breathing
Chest pain
High fever with worsening symptoms
Stiff neck
Severe headache
Signs of sepsis, such as fever, fast heart rate, confusion, extreme weakness, or low blood pressure
Symptoms that are rapidly worsening
How to prevent food poisoning
Four basic food safety steps: Clean, Separate, Cook, and Chill. This means keeping hands and surfaces clean, separating risky foods from other foods, cooking foods properly, and refrigerating promptly.
Practical prevention tips include:
Wash hands before preparing food
Wash hands after handling raw meat, poultry, seafood, or eggs
Use separate cutting boards for raw meat and produce
Cook foods to safe internal temperatures
Refrigerate leftovers within 2 hours
Reheat leftovers thoroughly
Avoid unpasteurized milk or juice
Wash fruits and vegetables
Do not eat recalled foods
Keep cold foods cold and hot foods hot
Throw away food that smells bad, looks spoiled, or was left out too long
Can telehealth help?
Yes. Telehealth may help with mild to moderate symptoms by reviewing your symptoms, hydration status, risk factors, medications, food exposure, and whether testing or in-person care may be needed.
Telehealth may not be appropriate if you have severe dehydration, bloody diarrhea, severe abdominal pain, persistent vomiting, confusion, fainting, pregnancy with significant symptoms, or signs of serious infection.
Final thought
Food poisoning is common and often improves with fluids, rest, and time. The most important step is preventing dehydration and watching for red flags. Bloody diarrhea, high fever, severe abdominal pain, persistent vomiting, symptoms lasting more than 3 days, or dehydration symptoms should be evaluated.
This information is for educational purposes only and does not replace medical advice, diagnosis, or treatment. If you are experiencing severe symptoms, signs of infection, severe allergic reaction symptoms, trouble breathing, or a medical emergency, call 911 or go to the nearest emergency room.
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