infection with nausea

Overview

Nausea is a feeling of wanting to vomit. When you have an infection, your body's immune system works hard to fight off germs. This response can sometimes make you feel sick to your stomach. It is often a normal part of the body's defense, but it can also be a sign that the infection is more serious.

Yes. Nausea is a very common symptom of many infections. Most people experience it at some point in their lives.

Anyone can get an infection with nausea, but it can be more severe in young children, older adults, and people with weakened immune systems.

Symptoms

Common symptoms

• Feeling sick to your stomach or wanting to vomit
• Vomiting
• Stomach cramps or pain
• Diarrhea
• Fever
• Loss of appetite
• Tiredness

Symptoms in children

• Fussiness or crying more than usual
• Refusing to eat or drink
• Sunken eyes or dry mouth (signs of dehydration)
• Fewer wet nappies than normal

Symptoms in older adults

• Less obvious symptoms, such as confusion or dizziness
• Rapid heart rate
• Low blood pressure
• Difficulty keeping fluids down
• Weakness or trouble getting up

Causes

Main causes

• Viruses, such as norovirus, rotavirus, or influenza
• Bacteria, such as Salmonella or E. coli
• Parasites found in contaminated food or water
• Food poisoning from eating undercooked or spoiled food
• Infections outside the digestive tract, such as urinary tract, ear, or respiratory infections

Risk factors

• Close contact with someone who is sick
• Travel to areas with poor sanitation or unsafe water
• Eating in places with poor food handling practices
• Having a weakened immune system due to illness or certain medications
• Being very young or very old

When to see a doctor

See a doctor urgently if:

• Vomiting that lasts more than 24 hours
• Signs of dehydration, such as dark urine, dry mouth, or dizziness
• High fever (above 39°C or 102°F)
• Severe pain in your stomach or head
• Blood in your vomit or stool
• Symptoms that get worse instead of better

Book a routine appointment if:

• Nausea that lasts for more than a few days without other symptoms
• Repeated episodes of nausea
• If you have a chronic condition like diabetes, kidney disease, or a weakened immune system
• If you are pregnant and have nausea

Diagnosis

A healthcare provider will ask about your symptoms, medical history, any recent travel, and whether you have been exposed to sick people or possibly contaminated food. They will also do a physical exam to check for signs of dehydration or other issues.

Tests that may be done

• Blood tests to check for signs of infection or dehydration
• Stool tests to look for bacteria, viruses, or parasites
• Urine tests to check for a urinary tract infection
• Imaging tests, such as an ultrasound or CT scan, if a serious abdominal problem is suspected (rarely needed)

What to expect at your appointment

The provider will likely ask when your symptoms started, how often you are vomiting, and whether you can keep fluids down. Based on this, they can often tell the likely cause and give you advice on how to manage it at home.

Treatment

Treatment focuses on relieving symptoms, preventing dehydration, and helping your body fight the infection. Most infections that cause nausea do not need specific medical treatment and get better on their own within a few days.

Self-care at home

• Drink plenty of clear fluids in small sips, such as water, broth, or an oral rehydration solution
• Rest as much as possible
• When you feel ready, eat bland, easy-to-digest foods like crackers, rice, or bananas
• Avoid dairy, caffeine, alcohol, and spicy or fatty foods until you feel better
• Wash your hands regularly to avoid spreading the infection to others

Medical treatments

In some cases, a doctor may prescribe medicines to reduce nausea or to treat the underlying infection, such as antibiotics for a bacterial infection. Always follow your healthcare provider's advice. Do not take over-the-counter medicines without asking a pharmacist or doctor first.

When is surgery considered?

Surgery is not usually needed for an infection with nausea. It may be considered only if a complication develops, such as appendicitis or an abscess.

Living with this condition

While you are recovering, listen to your body. Rest as much as you need and do not rush back to work, school, or other activities until you feel stronger.

Lifestyle tips

• Wash your hands frequently, especially after using the bathroom and before eating
• Do not prepare food for others until your symptoms have stopped for at least 48 hours
• Use separate towels and utensils to avoid spreading the infection
• Clean surfaces that may be contaminated with a disinfectant

Diet and exercise

Start with clear fluids and bland foods. When you feel up to it, gentle movement like walking can help you regain strength. Avoid strenuous exercise until you have fully recovered and are eating normally again.

Mental health and emotional wellbeing

Feeling unwell with nausea can be stressful and frustrating. It may make it hard to eat, sleep, or enjoy your usual activities. Remember that this is temporary. If you feel anxious or low, talk to someone you trust or contact a mental health support service. If you are in crisis or having thoughts of self-harm, call your local emergency number or a crisis line.

Prevention

Many infections that cause nausea can be prevented with good hygiene and safe food practices. Wash your hands often, cook food thoroughly, avoid unpasteurized drinks, and be careful with food when traveling. Not all infections can be avoided, but these steps lower your risk a lot.

Vaccines

Some infections that cause nausea, like rotavirus or flu, can be prevented with vaccines. Ask your healthcare provider about recommended vaccinations for you and your family.

Complications

If left untreated

• Dehydration, which is especially dangerous for children and older adults
• Electrolyte imbalances that can affect your heart and muscles
• Kidney damage (rare)
• Infection spreading to other parts of the body
• Inability to eat or drink enough, leading to weakness or malnutrition

Long-term outlook

Most people recover fully from an infection with nausea within a few days to a week. The outlook is very good, especially when you stay hydrated and seek medical care if symptoms are severe. Rare complications can happen, but early treatment helps prevent them.

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