Stomach flu in Oslo

Stomach flu can cause sudden nausea, vomiting, diarrhoea and abdominal cramps. It is often caused by norovirus or other viruses and usually resolves on its own within a few days.

At Easy Clinic in Majorstuen, you can book a doctor’s appointment if your symptoms are severe, do not improve as expected or you develop signs of dehydration.

For a life-threatening illness or severe symptoms, call 113. If you need urgent medical help that cannot wait, contact the public out-of-hours medical service on 116 117.

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woman with stomach flu

What is stomach flu?

Stomach flu is a contagious infection of the stomach and intestines. Norovirus is a common cause and can affect people of all ages.

Symptoms often begin suddenly and may include nausea, vomiting, diarrhoea and abdominal pain. Some people also develop a mild fever, headache or body aches.

In otherwise healthy people, the illness usually resolves within one to three days.

Common symptoms of stomach flu

Stomach flu may cause:
Nausea
Vomiting
Loose or frequent stools
Abdominal cramps or abdominal pain
Mild fever
Reduced appetite
Weakness
Dizziness
The main concern with frequent vomiting and diarrhoea is that the body may lose too much fluid.

What can you do yourself?

The most important thing is to drink enough fluids. If you are vomiting, it may be easier to drink small amounts frequently rather than a large amount at once.

You can:
Drink small sips regularly
Use an oral rehydration solution if you have significant fluid loss
Rest
Eat small, light meals when you are able to
Avoid alcohol and very fatty foods
Wash your hands thoroughly with soap and water
Norovirus spreads easily. Washing your hands with soap and running water is more important than using hand sanitiser alone, because alcohol-based hand sanitiser has limited effectiveness against norovirus.

When should you contact a doctor?

Contact a doctor if:
You are unable to keep fluids down
The vomiting or diarrhoea does not improve after a few days
You have reduced or dark urine
You become very weak or dizzy
You have a high fever or feel generally unwell
You have severe or persistent abdominal pain
You notice blood in your vomit or stool
The symptoms began during or after travel abroad
Young children, older people and those with a serious underlying condition may become dehydrated more quickly and may therefore need an earlier medical assessment.

Severe symptoms

Seek urgent medical help if you develop:
Vomiting blood
Large amounts of blood or black stools
Very severe or sudden abdominal pain
Fainting or confusion
Severe dehydration
Vomiting together with a severe headache and stiff neck
Rapid and marked deterioration
Contact the public out-of-hours medical service on 116 117 if the problem cannot wait. Call 113 if the condition appears life-threatening.

Examination and treatment

The doctor will ask when your symptoms started, how often you are vomiting or having diarrhoea, and whether you have a fever, abdominal pain or blood in your stool.

If necessary, the doctor may:
Examine your abdomen
Assess for signs of dehydration
Measure your temperature and other vital signs
Assess whether blood tests, a urine sample or a stool sample are needed
Assess whether medication is needed
Assess whether you need a sick note
Refer you for further assessment if a serious condition is suspected
Most cases of stomach flu are caused by viruses and resolve without antibiotics.

Doctor for stomach flu in Majorstuen

At Easy Clinic, you can book a doctor’s appointment if you have severe or persistent vomiting, diarrhoea or other symptoms of stomach flu.

We are centrally located in Majorstuen, Oslo. The doctor will assess whether you need treatment, tests, a sick note or further follow-up.

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Frequently asked questions about stomach flu in Oslo

How long does stomach flu last?

In otherwise healthy people, stomach flu usually resolves within one to three days. Contact a doctor if the symptoms last longer, become worse or you develop signs of dehydration.

What should I drink if I have vomiting and diarrhoea?

Drink small amounts frequently. Water or an oral rehydration solution may be appropriate. Small sips are often easier to keep down than large amounts.

How do I know if I am dehydrated?

Severe thirst, a dry mouth, reduced or dark urine, dizziness and marked weakness may be signs of dehydration.

Is stomach flu contagious?

Yes. Norovirus and other viruses that cause stomach flu can spread very easily. Thorough handwashing with soap and water helps reduce transmission.

Can I book a doctor’s appointment for stomach flu?

Yes. You can book an appointment at Easy Clinic if your symptoms are severe, last longer than expected or you would like a medical assessment.
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Easy Clinic offers fast and accessible medical care with short waiting times. You can easily book an appointment online, by phone, or come in for a drop-in consultation.

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