What Causes a Stomach Bug?

Several types of infections can lead to gastroenteritis.

Viral Gastroenteritis

Viruses are the most common cause of stomach bugs. Viral infections spread easily through close contact with infected individuals and contaminated surfaces, food or water.

Bacterial Gastroenteritis

Certain bacteria can cause more severe symptoms, often linked to food poisoning from contaminated food products or poor food hygiene practices.

Parasitic Infections

Although less common, parasites can also cause gastrointestinal infections. This can occur after travel to endemic areas or exposure to contaminated water sources.

How Long Does a Stomach Bug Last?

Most viral stomach bugs improve a few days, although some symptoms may persist for up to a week. Recovery times vary depending on the cause of the infection and individual health factors.
If symptoms continue for longer than a week or worsen, medical assessment may be necessary.

Treatment for a Stomach Bug

Most stomach bugs can be managed at home with supportive care.

Stay Hydrated

The biggest risk associated with gastroenteritis is dehydration. Frequent diarrhoea and vomiting can cause significant fluid loss.
Try to:
• Drink water regularly
• Use oral electrolyte solutions
• Take small sips if nausea makes drinking difficult
• Avoid alcohol, caffeinated drinks and spicy food

Get Plenty of Rest

Rest helps your body recover and fight the infection more effectively.

Eat Simple Foods

As symptoms improve, consider introducing bland foods such as:
• Toast
• Rice
• Bananas
• Crackers
• Plain potatoes
Avoid heavy, greasy, spicy or rich foods until you feel better.

Signs of Dehydration

Seek medical advice if you experience signs of dehydration, including:
• Dizziness
• Dry mouth
• Dark urine
• Reduced urine output
• Extreme thirst
• Weakness
• Rapid heartbeat
Young children, older adults and people with chronic health conditions are particularly vulnerable to dehydration.

When Should You Speak to a Doctor?

Although most stomach bugs resolve without treatment, medical attention may be needed if you experience:
• Symptoms lasting longer than several days
• Severe abdominal pain
• High fever
• Blood or mucus in your stool
• Persistent vomiting
• Inability to keep fluids down
• Signs of dehydration
• Symptoms following recent international travel
Healthcare professionals can assess whether further investigation or treatment is required.

Can You Get Treatment Online?

Online medical consultations provide a convenient way to discuss symptoms and receive professional advice without leaving home.
A healthcare provider can review your symptoms, recommend appropriate treatment options, advise on hydration and recovery and determine whether in-person assessment is necessary.

How to Prevent Stomach Bugs

Good hygiene practices can help reduce the risk of infection.
Prevention tips include:
• Wash hands thoroughly with soap and water after using the toilet and before eating
• Avoid sharing utensils during illness
• Clean contaminated surfaces regularly
• Follow safe food preparation practices
• Stay home when experiencing symptoms to avoid spreading infection

Get Expert Advice from an Online Doctor

If you’re experiencing symptoms of a stomach bug and are unsure whether you need treatment an online consultation can provide fast, convenient access to professional medical advice. Early assessment can help identify signs of dehydration, guide recovery and determine whether additional treatment is needed.