Vomiting and diarrhoea are common symptoms that can often be managed at home with rest and adequate fluid intake. However, symptoms can sometimes become more severe, particularly when fluid loss leads to dehydration or when vomiting prevents you from keeping fluids down.
If symptoms develop outside your regular GP’s opening hours, knowing when to seek medical advice can help you make an informed decision about your care. After-hours doctors can assess suitable non-life-threatening cases and determine whether home management, further investigation or additional medical care is appropriate.
What Causes Vomiting and Diarrhoea?
Vomiting and diarrhoea can occur for many different reasons. Common causes include gastroenteritis, foodborne illness and some infections. Certain medications and other medical conditions can also cause gastrointestinal symptoms.
Because there are several possible causes, the appropriate management depends on factors such as your symptoms, medical history, age and overall health.
In many mild cases, symptoms improve with rest and adequate fluid intake. However, persistent or severe symptoms may require medical assessment.
When Can Vomiting and Diarrhoea Be Managed at Home?
If symptoms are mild and you can drink and keep fluids down, you may be able to manage them at home.
General supportive measures can include:
- Taking frequent small sips of water or other suitable fluids
- Resting as needed
- Gradually returning to food when you feel able to eat
- Avoiding foods or drinks that appear to worsen your symptoms
- Monitoring for signs of dehydration
There is no need to force food if you have little appetite. Maintaining adequate fluid intake is generally more important during the early stages of gastrointestinal illness.
If symptoms persist, worsen, or you are concerned about your condition, seek medical advice.
When Should You See a GP?
You should consider seeing a GP when vomiting or diarrhoea is persistent, worsening or interfering with your ability to maintain adequate fluid intake.
Medical assessment may be particularly appropriate if you experience:
- Repeated vomiting
- Frequent diarrhoea
- Difficulty keeping fluids down
- Increasing weakness or dizziness
- Signs of dehydration
- Significant abdominal pain
- Blood in vomit or stool
- A persistent or high fever
- Symptoms that are not improving as expected
A GP can assess your symptoms, medical history and hydration status and determine whether further investigation or treatment is required.
Why Dehydration Is an Important Concern
Vomiting and diarrhoea can cause the body to lose significant amounts of fluid and electrolytes.
Signs that may indicate dehydration include:
- Increased thirst
- Dry mouth
- Reduced urination
- Darker urine
- Dizziness
- Unusual tiredness or weakness
More significant dehydration can become serious and may require urgent medical treatment.
Children, older adults and people with certain underlying medical conditions can be more vulnerable to dehydration, so medical advice may be appropriate sooner if symptoms are concerning.
When Can After Hours Doctors Help?
Gastrointestinal symptoms do not follow a convenient schedule. Vomiting or diarrhoea may begin during the evening, overnight or at a time when your regular GP is unavailable.
After-hours doctors can assess non-life-threatening cases when you need medical attention outside standard clinic hours.
During a consultation, the GP may:
- Discuss when your symptoms started
- Ask about the frequency and severity of vomiting or diarrhoea
- Review your medical history and medications
- Assess for signs of dehydration
- Perform a physical examination where appropriate
- Recommend suitable management
- Arrange investigations if clinically indicated
- Recommend follow-up with your regular GP
Treatment is determined on an individual basis following clinical assessment.
What About Children?
Vomiting and diarrhoea can be particularly concerning in babies and young children because they can become dehydrated more quickly.
Parents and carers should monitor children for signs such as:
- Reduced urination or fewer wet nappies
- Dry mouth
- Unusual sleepiness or reduced responsiveness
- No tears when crying
- Difficulty keeping fluids down
- Worsening symptoms
If you are concerned about a child’s condition, seek medical advice rather than relying solely on general information. The urgency depends on the child’s age, symptoms, hydration and overall condition.
What Can You Expect During an After-Hours GP Appointment?
The doctor will first assess your symptoms and relevant medical history. Depending on the presentation, they may examine your abdomen and look for signs of dehydration or other concerning features.
Further tests may be recommended when clinically appropriate.
Your doctor may provide advice about:
- Maintaining fluid intake
- Diet during recovery
- Symptom management
- Warning signs to monitor
- When to seek further medical care
- Follow-up with your regular GP
Medication is not automatically required for vomiting or diarrhoea. Whether medication is appropriate depends on the underlying cause and individual circumstances.
When Is Emergency Care Required?
Some symptoms require immediate emergency assessment rather than an after-hours GP appointment.
Call 000 or attend your nearest emergency department if you experience:
- Severe difficulty breathing
- Loss of consciousness
- Severe or rapidly worsening abdominal pain
- Significant or uncontrolled bleeding
- Vomiting blood
- Severe dehydration or collapse
- Confusion or markedly reduced responsiveness
- A serious medical emergency of any kind
For children, infants or other vulnerable patients, seek urgent medical attention if their condition appears to be deteriorating or you are seriously concerned.
Reducing the Risk of Spreading Gastrointestinal Illness
If vomiting or diarrhoea is caused by an infectious illness, good hygiene can help reduce transmission.
Useful precautions include:
- Washing hands thoroughly with soap and water
- Cleaning contaminated surfaces appropriately
- Avoiding preparing food for others while unwell
- Not sharing towels, utensils or personal items
- Following public health or medical advice about returning to work, school or childcare
Hand hygiene is particularly important after using the toilet and after caring for someone unwell.
Getting Medical Advice When Your GP Is Closed
Most mild cases of vomiting and diarrhoea improve with supportive care, but persistent symptoms, dehydration or concerning changes warrant medical assessment.
When your regular GP is unavailable, after-hours doctors can provide assessment for suitable non-emergency cases and help determine the most appropriate next step. GP After Hours Subiaco provides after-hours medical care for patients in Subiaco and surrounding Perth areas, with access to diagnostic services where clinically appropriate and communication with your regular GP to support continuity of care.
Important: This article provides general health information and is not a substitute for personalised medical advice or diagnosis. Vomiting and diarrhoea can have many causes. If symptoms are severe, rapidly worsening or you believe you are experiencing a medical emergency, call 000 or attend your nearest emergency department.
