Gastroenteritis: hydration, time away from work and when to seek help

Gastroenteritis can cause vomiting, diarrhoea and abdominal discomfort. The immediate concern is often whether you can replace lost fluids and whether symptoms suggest a more serious problem. Seek prompt assessment for dehydration, worsening abdominal pain, blood in stools or inability to keep fluids down. Severe illness needs urgent care. Healthdirect Australia: Gastroenteritis

Gastro is a description, not a reason to ignore other causes

People often call any short episode of vomiting or diarrhoea “gastro”. Infection is a common explanation, but a clinician may need to consider other causes depending on the symptoms and history. Do not assume everyone in a household has the same illness solely because one person became unwell first.

Explain when symptoms began, whether vomiting or diarrhoea is more prominent and where any pain occurs. Mention fever, blood, recent travel, recent treatment and other medical conditions. These details help determine whether self-care, examination or testing is needed. Healthdirect Australia: Gastroenteritis

Check hydration before worrying about food

Tell the clinician whether you can keep fluids down and how often you are urinating. Passing much less urine, dizziness on standing or unusual weakness can be important signs. Frequent small sips may be easier to manage than trying to drink a large amount at once. Ask a pharmacist or clinician about suitable rehydration options. Healthdirect Australia: Gastroenteritis

Do not use this guide to calculate an individual fluid prescription. People with certain medical conditions may have specific fluid advice. If you have been told to restrict fluids, explain that when seeking help. Severe dehydration may need treatment that cannot be provided through telehealth.

When should an adult seek prompt care?

Worsening abdominal pain, repeated vomiting, bloody stools, fever or signs of dehydration warrant assessment. If you are unable to keep fluids down, do not simply wait for the illness to run its expected course. Older people and those with weakened immune systems can be more vulnerable to complications. Healthdirect Australia: Gastroenteritis

Seek emergency help for collapse, confusion or severe deterioration. If you are unsure where to go, contact healthdirect on 1800 022 222 for advice. Call 000 for an emergency. A request for a work certificate should not delay the clinical assessment of significant symptoms.

Babies and children need their own assessment

A baby under six months with suspected gastro should be seen by a doctor. Children can become dehydrated more quickly, and signs may include unusual sleepiness, fewer wet nappies or poor drinking. Green vomit, blood in stools or severe abdominal pain also require prompt assessment. Healthdirect Australia: Gastroenteritis

Do not apply adult treatment advice or products to a child without checking. Continue to seek help if you are worried even when a symptom list does not exactly match what you see. This page does not establish that Doccio provides paediatric gastro care; contact an appropriate local service for the child's needs.

What can I eat?

If you feel hungry, try food you can tolerate and keep the focus on replacing fluids. A short illness does not require a complicated restrictive diet assembled from internet rules. Ask for individual advice if you have a medical condition affecting diet or symptoms are prolonged. Healthdirect Australia: Gastroenteritis

Tell the doctor if eating triggers severe pain, vomiting continues or you are losing weight unexpectedly. Those changes deserve assessment rather than repeated attempts to find a food that solves the problem. If several people became ill after the same meal, mention the shared exposure.

Will I need tests or a prescription?

Many episodes are managed with supportive care, but a clinician may recommend testing or treatment depending on the history, severity and progress. A stool test may be considered when the cause needs clarification or symptoms are not settling. It is not an automatic requirement for every episode. Healthdirect Australia: Gastroenteritis

A doctor decides whether any prescription is appropriate. Do not use leftover treatment or take another person's medicine. Ask a pharmacist before using symptom-relief products, especially for children or when other health conditions are present. The right question is what fits the current illness, not what stopped symptoms during a previous episode.

Reducing spread at home

Wash hands carefully after using the toilet, changing nappies or cleaning up vomit, and before handling food. Avoid preparing food for others while unwell. Clean contaminated areas and follow appropriate laundry and hygiene advice. Sharing towels or utensils can make household infection control harder. Healthdirect Australia: Gastroenteritis

If you care for someone else, think about how to obtain supplies and support without exposing others unnecessarily. Tell a pharmacy or clinic that vomiting or diarrhoea is present before arriving, so it can explain any arrangements. Practical planning can reduce unnecessary trips while allowing needed care.

When can I return to work?

Healthdirect advises staying away from work or school until at least 48 hours after the last episode of vomiting or diarrhoea. Healthcare, aged care, childcare and food-handling settings may have additional requirements or outbreak instructions. Check the current policy for your setting rather than using a generic certificate as clearance. Healthdirect Australia: Gastroenteritis

Being no longer infectious enough to return under a policy and being physically fit to perform your duties are separate considerations. If you remain weak or unable to manage normal activities, discuss that with a clinician. The return decision should reflect both the setting's rules and your current capacity.

What if I need a medical certificate?

Notify your employer promptly and ask what evidence is required. Explain the dates, work duties and how symptoms affected your capacity. A doctor decides what period can be supported; the requested number of days is not guaranteed. Fair Work guidance on notice and medical evidence

Use Doccio's medical certificate guide to understand the documentation pathway. If symptoms are severe or require examination, seek the appropriate clinical care first. If you are caring for an unwell family or household member, the relevant question may instead involve carer's leave evidence.

Prepare for a non-emergency consultation

Have a short timeline ready, including the last vomiting or diarrhoea episode, fluid intake, urine changes and any fever or blood. List regular medicines, allergies, recent travel and whether others are unwell. Explain if a workplace needs a specific infection-control clearance or form.

A doctor may recommend in-person examination rather than completing the assessment online. Ask how urgently to attend and what information to bring. Confirm who will review any tests and how to seek further help if symptoms continue. A useful plan should make the next decision clear, including when the situation no longer fits home care.

Travel, shared meals and workplace outbreaks

Tell the clinician about recent travel, untreated water, a shared meal or several people becoming unwell together. Include when the exposure occurred and when symptoms began. A sequence of events is useful; it does not prove which food or person caused the illness. Avoid naming a business publicly as the cause before the situation has been assessed.

If you work in a care or food-handling setting, tell the workplace about the illness through its required process. There may be outbreak instructions or a nominated person coordinating advice. Ask how those instructions interact with your clinical plan and return date. Healthdirect Australia: Gastroenteritis

If the doctor requests a sample, ask the collection service about the correct container, timing and delivery. Do not improvise a container or store a sample according to a rule intended for a different test. Confirm who will receive the result, especially if you are travelling and will not be near the original clinic when it becomes available.

Discuss your next step with a doctor

Read about Doccio's online doctor consultation and book an online doctor appointment for a suitable non-emergency concern. Bring the relevant history, records and questions from this guide. A doctor decides whether advice, treatment, a document, testing or in-person care is appropriate. Check current fees and service information before booking. If symptoms are urgent, use the appropriate urgent or emergency service instead of waiting for a routine appointment.