Indigestion vs nausea: how the symptoms differ

Indigestion is discomfort centred in the upper abdomen after eating, while nausea is the unsettled feeling that you may vomit.

The two symptoms can occur together. A rich meal, reflux, an infection, a medicine, pregnancy, anxiety or another health issue can produce one or both, so the timing and accompanying symptoms matter more than the label alone.

Indigestion is the clearer description when the problem feels like pressure, burning or uncomfortable fullness between the chest and navel. It often follows eating and may be linked with burping, an acid taste in the mouth or symptoms that worsen when lying down.

A brief note of foods, drinks, meal size, medicines and position after meals can make a pattern easier to recognise. Avoiding a large late meal and remaining upright after eating may be reasonable while you arrange routine advice if the problem keeps returning.

Nausea is the better word when the dominant experience is feeling sick or close to vomiting, even if you do not actually vomit. It may come in waves and can be triggered by movement, strong odours, pain, a viral illness, migraine, some medicines or pregnancy.

Small sips of fluid can be easier than large drinks when your stomach feels unsettled. If you are vomiting, pay attention to whether you can keep fluids down and whether urine becomes unusually dark or infrequent, as these can suggest dehydration.

Seek urgent medical help for chest pressure, breathlessness, fainting, confusion, severe or worsening abdominal pain, vomit that looks bloody or like coffee grounds, black stools, or a swollen rigid abdomen. These signs need assessment because they can occur with problems beyond ordinary digestive upset.

Contact a clinician promptly if vomiting prevents you from keeping fluids down, if you have signs of dehydration, or if indigestion is new and persistent alongside trouble swallowing, unintentional weight loss or repeated vomiting. A child, older adult or person with significant medical conditions may need earlier advice.

Neither term fully captures every upper-body symptom. Heartburn is a burning feeling rising behind the breastbone; abdominal pain is pain rather than fullness or queasiness; and dizziness can create nausea without a digestive cause. Naming the location, sensation and trigger gives a clinician more useful detail.

Stress can affect appetite and digestion, but it should not be used to explain away a new, severe or persistent symptom. Tell a clinician about any recent illness, possible pregnancy, new medicine or supplement, alcohol use, and changes in bowel habit.

A clinician will usually ask where the sensation is felt, its relation to food and movement, whether vomiting or reflux is present, and which medicines you take. They may examine your abdomen and consider tests or treatment based on your symptoms, medical history and warning signs.

Bring a concise symptom record if the issue is recurrent: when it starts, what you ate or drank, what makes it better or worse, and any associated fever, bowel changes, headache or menstrual changes. This helps distinguish a short-lived episode from a pattern needing further assessment.