Stomach Pain: When to Worry and When to Wait
At a Glance
Most stomach pain resolves within 24-48 hours with rest, fluids, and OTC treatment. Sudden severe pain, blood in vomit or stool, rigid abdomen, or pain with high fever are red flags requiring urgent medical attention.
Buscopan for cramping pain, Gaviscon for reflux and heartburn
Mylanta Double Strength for fast-acting indigestion relief
Stomach pain is tricky because the same symptom can point to something minor or something that really should not be ignored. Indigestion after a heavy meal is one thing. Sudden worsening pain with fever, vomiting, or tenderness in one spot is another. This guide is here to help sort the common, self-limiting causes from the situations where waiting is the wrong move.
Types of Stomach Pain by Location
Where the pain sits can give a useful clue, even though location alone is never enough to diagnose the cause. Think of it as a starting point rather than an answer.
| Location | Common Causes | Typical Feeling |
|---|---|---|
| Upper centre (epigastric) | Indigestion, reflux (GORD), gastritis, peptic ulcer | Burning, gnawing, or aching after eating |
| Upper right | Gallstones, liver issues | Sharp or colicky pain, may radiate to right shoulder |
| Upper left | Spleen issues, stomach ulcer, pancreatitis | Dull or sharp ache, may worsen after eating |
| Around the belly button | Early appendicitis, gastroenteritis, small bowel issues | Cramping or dull ache that may shift to lower right |
| Lower right | Appendicitis, ovarian cyst (women), hernia | Starts dull, becomes sharp and localised |
| Lower left | Constipation, diverticulitis, IBS | Cramping, bloating, relieved by passing wind or opening bowels |
| Lower centre (pelvic) | Period pain, urinary tract infection, constipation | Cramping, pressure, or dull ache |
| Widespread / all over | Gastroenteritis, food poisoning, IBS, stress | Generalised cramping, bloating, nausea |
What is GORD?
Gastro-oesophageal reflux disease (GORD) is the Australian term for chronic acid reflux. It occurs when stomach acid regularly flows back into the oesophagus (food pipe), causing heartburn, regurgitation, and sometimes a sour taste in the mouth. You may see it spelled GERD in American sources — it is the same condition.
Common Causes of Stomach Pain
Indigestion (Dyspepsia)
Indigestion is that uncomfortable fullness, bloating, or burning in the upper abdomen during or after eating. It is extremely common and is usually triggered by eating too much, eating too quickly, fatty or spicy foods, or drinking alcohol or caffeine. It is not a disease itself but a group of symptoms. Most cases settle within a few hours without treatment.
Acid Reflux and Heartburn
Heartburn is a burning sensation behind the breastbone caused by stomach acid flowing upward into the oesophagus. It often worsens when lying down or bending over. Occasional heartburn is normal, but if it happens more than twice a week, it may be GORD and is worth discussing with your GP. Triggers include spicy food, citrus, alcohol, coffee, large meals, and eating close to bedtime.
Gastroenteritis (Gastro)
The classic 'stomach bug'. Gastro is an infection of the stomach and intestines, usually caused by a virus (norovirus, rotavirus) or bacteria (Salmonella, Campylobacter). Symptoms include cramping abdominal pain, watery diarrhoea, nausea, vomiting, and sometimes fever. Most cases resolve within 1-3 days. The main risk is dehydration, especially in young children and the elderly.
Irritable Bowel Syndrome (IBS)
IBS is a common functional gut disorder affecting around 1 in 5 Australians. It causes recurring abdominal pain or cramping, bloating, and altered bowel habits (diarrhoea, constipation, or both). IBS is not dangerous, but it can significantly affect quality of life. Symptoms often worsen during stress or after certain foods. A GP can help with diagnosis and a management plan, which may include dietary changes such as a low-FODMAP diet.
Constipation
Infrequent or difficult bowel motions are a very common cause of lower abdominal pain, bloating, and cramping. Most constipation responds well to increased fibre (aim for 25-30g per day), adequate water intake (at least 6-8 glasses daily), and regular physical activity. If lifestyle measures are not enough, an osmotic laxative such as Movicol or a stool softener like Coloxyl can help. Avoid stimulant laxatives for regular use unless advised by a pharmacist.
Food Poisoning
Food poisoning typically comes on within 2-6 hours of eating contaminated food (though some types take longer). Symptoms include sudden cramping, nausea, vomiting, and diarrhoea. Most cases are self-limiting within 24-48 hours. Focus on replacing fluids and electrolytes. If symptoms are severe, last beyond 48 hours, or include blood in the stool, see a doctor.
OTC Treatments: What to Use and When
Matching the right OTC medicine to your symptoms is key. Here is a practical breakdown of what is available at Australian pharmacies, organised by condition.
For Indigestion and Heartburn: Antacids
Antacids work by neutralising excess stomach acid. They provide fast relief — usually within minutes — but the effect is short-lived (1-3 hours). Best for occasional, mild symptoms after meals. Gaviscon Dual Action also forms a protective raft on top of stomach contents, which helps prevent acid from flowing back up the oesophagus.
Gaviscon Dual Action
Fast-acting relief from heartburn and indigestion. Forms a protective barrier on top of stomach contents.
Mylanta Double Strength Antacid
Double strength relief from heartburn, indigestion, and wind. Fast-acting liquid formula.
For Frequent Heartburn: Proton Pump Inhibitors (PPIs)
If you experience heartburn more than twice a week, a proton pump inhibitor (PPI) may be more effective than antacids. PPIs reduce acid production at the source by blocking the enzyme responsible for making stomach acid. Nexium 24HR (esomeprazole 20mg) is available over the counter at Australian pharmacies. Take it once daily, 30 minutes before breakfast. It can take 1-4 days to reach full effect. PPIs are intended for short-term use (up to 2 weeks without GP advice). See your GP if symptoms persist.
Nexium 24HR (Esomeprazole 20mg)
Proton pump inhibitor for 24-hour relief of frequent heartburn. Reduces stomach acid production at the source.
For Abdominal Cramps and IBS Pain: Antispasmodics
Buscopan (hyoscine butylbromide) is an antispasmodic that relaxes the smooth muscle in the gut wall. It is useful for cramping abdominal pain, period-related stomach cramps, and IBS-related pain. It works specifically on the gut, so it does not cause drowsiness. Take 2 tablets (10mg each) up to 3 times daily when cramps occur. Not recommended for children under 6.
Buscopan Cramps
Antispasmodic for relief of abdominal cramps, stomach pain, and IBS symptoms.
For Diarrhoea: Loperamide (Imodium)
Imodium (loperamide 2mg) slows gut motility, reducing the frequency and urgency of loose bowel motions. It is useful for acute diarrhoea in adults, particularly when you need symptom control (for example, while travelling or at work). Start with 2 capsules, then 1 after each loose motion (maximum 6 capsules in 24 hours). Do not use if you have blood in your stool, high fever, or suspected food poisoning — in these cases the body needs to clear the infection. Not suitable for children under 12 without medical advice.
When NOT to Use Imodium
Do not take loperamide (Imodium) if your diarrhoea is accompanied by blood or mucus in the stool, high fever (over 38 degrees C), or suspected bacterial food poisoning. In these situations, diarrhoea is the body's way of clearing the infection, and stopping it can make things worse. See a doctor instead.
Imodium Capsules (Loperamide 2mg)
Fast-acting relief from diarrhoea. Slows gut motility to reduce frequency of loose bowel motions.
For Dehydration (During Gastro or Diarrhoea): Oral Rehydration
Dehydration is the main risk with gastro and prolonged diarrhoea, especially in children and older adults. Hydralyte is an oral rehydration solution (ORS) that replaces lost water, electrolytes (sodium, potassium), and glucose in the scientifically correct ratio recommended by the World Health Organization. It is far more effective than water alone, sports drinks, or soft drinks for treating dehydration. Available as effervescent tablets, icy poles, or ready-to-drink liquid. Use at the first sign of vomiting or diarrhoea — do not wait until you feel significantly dehydrated.
Hydralyte Electrolyte Solution
Oral rehydration solution for rapid rehydration during diarrhoea, vomiting, fever, and heavy sweating. TGA listed.
OTC Treatment Quick Reference
| Symptom | Recommended OTC Medicine | How It Works | Key Caution |
|---|---|---|---|
| Indigestion / mild heartburn | Gaviscon Dual Action, Mylanta | Neutralises stomach acid; Gaviscon also forms a raft | Short-lived relief only; see GP if frequent |
| Frequent heartburn (more than 2x/week) | Nexium 24HR (esomeprazole) | Blocks acid production at the source | Max 2 weeks OTC use; see GP if no improvement |
| Stomach cramps / IBS pain | Buscopan (hyoscine butylbromide) | Relaxes smooth muscle in the gut wall | Not for children under 6 |
| Acute diarrhoea | Imodium (loperamide) | Slows gut motility | Avoid with bloody stool, fever, or suspected bacterial infection |
| Dehydration from gastro | Hydralyte | Replaces electrolytes and fluids in correct ratio | Not a substitute for medical care in severe dehydration |
Red Flags: When Stomach Pain Needs Urgent Medical Attention
Most stomach pain is not dangerous. But certain warning signs mean you should seek urgent medical care — visit your nearest emergency department or call 000 (triple zero) in Australia. Do not wait to see if things improve.
Call 000 or Go to Emergency If You Have
Seek urgent medical care immediately if you experience any of the following:
- •Sudden, severe abdominal pain that takes your breath away or makes you double over
- •Pain in the lower right abdomen that started around the belly button and moved — this is a classic sign of appendicitis
- •Vomiting blood (may look red or like dark coffee grounds)
- •Blood in your stool (bright red or black, tarry stools)
- •A rigid, board-like abdomen that is extremely tender to touch — this suggests peritonitis, an emergency
- •Abdominal pain with a fever over 38.5 degrees C
- •Inability to pass gas or have a bowel motion with worsening pain, bloating, and vomiting — possible bowel obstruction
- •Abdominal pain during pregnancy — always treat as urgent
- •Pain with dizziness, fainting, rapid heartbeat, or clammy skin — signs of possible internal bleeding or shock
Appendicitis: What to Watch For
Appendicitis is inflammation of the appendix and is a surgical emergency. It is most common in people aged 10-30 but can happen at any age. The classic progression is: vague pain around the belly button that over 12-24 hours moves to the lower right abdomen and becomes sharper and more constant. The pain typically gets worse with movement, coughing, or pressing on the area and then releasing (rebound tenderness). Nausea, loss of appetite, and a mild fever often accompany the pain. If you suspect appendicitis, do not eat or drink anything (in case surgery is needed) and get to an emergency department.
Bowel Obstruction: Know the Signs
A bowel obstruction occurs when something blocks the normal passage of food and waste through the intestines. Warning signs include severe cramping pain that comes in waves, inability to pass gas or stool, a visibly bloated or distended abdomen, and vomiting (which may become faecal in severe cases). This is a medical emergency requiring hospital treatment. Risk is higher in people who have had previous abdominal surgery.
When to See a GP (Non-Urgent but Important)
Not all stomach pain needs the emergency department, but some patterns warrant a GP visit within a few days. Book an appointment if you experience any of the following.
- •Stomach pain that persists for more than 3-5 days without improving
- •Recurring pain in the same location over weeks or months
- •Pain that regularly wakes you from sleep at night
- •Unintentional weight loss alongside stomach pain
- •A noticeable change in bowel habits lasting more than 2 weeks (new constipation, diarrhoea, or alternating between the two)
- •Heartburn or reflux symptoms occurring more than twice a week
- •Difficulty swallowing or a feeling of food getting stuck
- •Pain that is affecting your ability to eat, work, or go about daily activities
- •A new lump or swelling in your abdomen
- •You are over 50 and experiencing new or changed abdominal symptoms — your GP may recommend bowel cancer screening
Bowel Cancer Screening
The Australian Government offers free bowel cancer screening kits to people aged 50-74 through the National Bowel Cancer Screening Program. If you are in this age group and experiencing new or changed bowel symptoms, talk to your GP. Early detection saves lives — bowel cancer has a 99% survival rate when found early.
Home Remedies That May Help
For mild stomach pain without red flags, these simple home strategies can provide comfort while your body recovers. The evidence for most home remedies is limited, but they are generally safe and have a long track record of traditional use.
The BRAT Diet
BRAT stands for Bananas, Rice, Applesauce, and Toast. These bland, low-fibre foods are gentle on the stomach and can help firm up stools during diarrhoea. While the strict BRAT diet is no longer recommended for extended use (it lacks adequate nutrition), eating bland, easily digestible foods for the first 24-48 hours of gastro or food poisoning is still sensible advice. Gradually reintroduce normal foods as symptoms improve. Avoid fatty, spicy, or dairy-heavy foods until you feel better.
Ginger
Ginger has moderate evidence for relieving nausea and may help with indigestion. Fresh ginger tea (steep a few slices of fresh ginger root in hot water for 5-10 minutes) is the most common preparation. Ginger is generally considered safe in food amounts, though it may interact with blood-thinning medications. Evidence quality: moderate for nausea, limited for other stomach complaints.
Peppermint Tea
Peppermint has antispasmodic properties that may help relax gut muscles and relieve bloating and gas. A cup of peppermint tea after meals is a popular remedy. Note that peppermint can worsen reflux and heartburn in some people by relaxing the lower oesophageal sphincter (the valve between the stomach and oesophagus). If reflux is your issue, avoid peppermint. Evidence quality: moderate for IBS symptoms, limited for general stomach pain.
Heat Pack
Applying a heat pack or hot water bottle to the abdomen can help relieve cramping pain. The warmth relaxes smooth muscle and can be particularly soothing for period-related stomach cramps, IBS pain, and general abdominal tension. Wrap the heat pack in a towel to avoid burns and apply for 15-20 minutes at a time. Evidence quality: moderate for pain relief, supported by common clinical practice.
Rest and Fluids
Sometimes the most effective remedy is rest. Avoid solid food for a few hours if you feel nauseated, then start with small sips of clear fluids — water, diluted apple juice, or an oral rehydration solution like Hydralyte. Avoid caffeine, alcohol, and sugary soft drinks, which can irritate the stomach or worsen dehydration. Aim for frequent small sips rather than large gulps, especially if vomiting is present.
Home Remedies to Avoid
- •Bicarbonate of soda (baking soda): While it does neutralise acid, it is high in sodium and can cause rebound acid production. Use a proper antacid instead.
- •Milk for heartburn: A common myth. Milk may briefly coat the stomach, but the fat and protein actually stimulate more acid production, making reflux worse.
- •Apple cider vinegar: No credible evidence supports its use for stomach pain, and it can irritate the oesophagus and damage tooth enamel.
- •Charcoal tablets for general stomach pain: Activated charcoal has a role in treating certain poisonings in hospital settings, but OTC charcoal tablets have no proven benefit for everyday stomach pain or gas.
Special Populations
Some groups need extra caution when it comes to stomach pain and OTC treatments.
- •Pregnant or breastfeeding: Always consult your GP, obstetrician, or pharmacist before taking any OTC stomach medicine. Some antacids are considered safe in pregnancy, but others are not. Abdominal pain in pregnancy should always be assessed by a health professional.
- •Children under 12: Many OTC digestive medicines are not suitable for young children. Hydralyte is safe for children (use the paediatric dosage), but Imodium and Buscopan have age restrictions. See your pharmacist or GP for children's dosing advice.
- •Older adults (over 65): Dehydration can develop more quickly in older people. Seek medical attention sooner if gastro symptoms are present. Some medicines, including PPIs, have additional considerations for long-term use in the elderly.
- •People on blood thinners or other regular medications: Always check with your pharmacist for potential interactions before taking OTC stomach medicines.
Frequently Asked Questions
How long should I wait before seeing a doctor for stomach pain?
If you have any red flag symptoms (sudden severe pain, blood in stool or vomit, rigid abdomen, high fever, or pain during pregnancy), do not wait — seek urgent medical care immediately. For milder pain without red flags, it is reasonable to try home treatment and OTC remedies for 24-48 hours. If the pain persists beyond 3-5 days, keeps coming back, or is getting worse, book a GP appointment.
Is it safe to take antacids every day?
Occasional antacid use is safe for most adults. However, if you find yourself reaching for antacids most days, this suggests an underlying issue that needs investigation. Daily antacid use for more than 2 weeks warrants a GP visit. Long-term overuse of some antacids (particularly those containing aluminium or magnesium) can affect mineral balance. Your GP may recommend a short course of a PPI or further investigation.
Can stress cause stomach pain?
Yes. The gut and brain are closely connected through the gut-brain axis. Stress, anxiety, and emotional distress can trigger or worsen stomach cramps, nausea, diarrhoea, and IBS symptoms. This is sometimes called a 'nervous stomach'. The pain is real — it is not imaginary. Managing stress through exercise, sleep, relaxation techniques, and professional support can genuinely improve gut symptoms. If stress-related gut problems are ongoing, talk to your GP.
Should I take Imodium for gastro?
Generally, no — at least not in the first 24 hours. With viral gastro, diarrhoea is the body's way of clearing the infection. Taking Imodium too early can prolong the illness. Focus on staying hydrated with an oral rehydration solution like Hydralyte. However, if diarrhoea is persisting beyond 48 hours and there is no blood or high fever, Imodium may provide symptom relief while you recover. Always avoid Imodium if you suspect bacterial food poisoning.
What is the difference between Gaviscon and Mylanta?
Both are antacids that neutralise stomach acid and provide fast relief. The key difference is that Gaviscon also forms a physical barrier (called a raft) on top of your stomach contents, which helps prevent acid from flowing back up into the oesophagus. This makes Gaviscon particularly useful if reflux is your main problem. Mylanta Double Strength is effective for general indigestion, bloating, and wind. Your pharmacist can help you choose between them based on your specific symptoms.
When should I go to the emergency department versus waiting for a GP?
Go to the emergency department (or call 000) for: sudden severe pain, vomiting blood, blood in stool, a rigid abdomen, pain with high fever, suspected appendicitis, inability to pass gas or stool with vomiting, or abdominal pain during pregnancy. Book a GP appointment for: pain lasting more than a few days, recurring pain, unexplained changes in bowel habits, unintentional weight loss, or frequent heartburn. When in doubt, call Healthdirect on 1800 022 222 (free, 24/7) for advice from a registered nurse.
Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always read the label and follow the directions for use. If symptoms persist, talk to your health professional. See your pharmacist or GP for advice tailored to your situation.
