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Expert reviewed by Qurath Ain, Certified Nutritionist and Clinical Dietitian
“My stomach is acting up.” It’s one of the most common things people say after a meal. But if you ask a follow-up question, “What exactly are you feeling?”, the answers can be very different.
Some people describe a burning feeling in the chest. Others complain that food feels like it’s sitting in their stomach for hours. Someone else says they have a sour taste in their mouth after dinner.
And almost everyone calls all of it acidity.
Here’s the thing. Acidity, heartburn and indigestion are related, but they’re not the same thing. Using the right word may not seem important, but understanding the difference can help you identify patterns, choose the right lifestyle changes and know when it’s time to see a doctor.
Let’s decode what your gut might actually be trying to tell you.
In everyday conversations, “acidity” has become a catch-all phrase.
Be it chest burning, bloating, burping, or even stomach pain, the answer’s always “acidity”. But your digestive system doesn’t lump all these symptoms together.
Different symptoms often point to different processes. The more accurately you can describe what’s happening, the easier it becomes to spot patterns.
Let’s begin with the condition that people often mean when they say “acidity.” Your stomach naturally produces acid to help digest food. Sometimes, some of the stomach’s contents move back up into the oesophagus — the tube connecting your mouth to your stomach. This is called acid reflux.
Occasional reflux is common and can happen after a large meal or if you lie down soon after eating. The most recognisable symptom of acid reflux is heartburn.
Despite its name, heartburn has nothing to do with your heart. Heartburn is a symptom, not a disease. A burning sensation in the chest or back of the chest is usually referred to as heartburn, which can be an underlying symptom of acidity, GERD, gastritis, etc.
People usually describe it as:
If you’ve ever felt a burning sensation after a late-night dinner, you’ve probably experienced heartburn.
So here’s an easy way to remember it: Acid reflux is the process. Heartburn is one of its most common symptoms.
Indigestion — also called dyspepsia — is different.
Instead of burning, people often describe:
Notice what’s missing? The classic burning sensation. Someone with indigestion may not experience heartburn at all. Likewise, someone with heartburn may not feel heavy after meals. The two conditions can overlap, but they aren’t identical.
Imagine you’ve had a stressful day. You skipped breakfast. Lunch was rushed. Dinner happened at 10.30 pm. You went straight to bed afterwards. The next morning you wake up saying, “I’ve got acidity.”
But what actually happened? Was it heartburn? Acid reflux? Indigestion? Bloating? All of the above? Without looking more closely, it’s impossible to know. That’s why paying attention to the exact symptom is far more useful than simply calling everything “acidity.”
Here’s an interesting example. Three friends eat the same restaurant meal. One develops heartburn. Another feels unusually heavy for the rest of the evening. The third feels perfectly fine.
Same food. Different digestive systems.
Your personal routine, meal timing, portion size, sleep, stress and eating speed all influence how your body responds. That’s why copying someone else’s “trigger food” list isn’t always helpful.
When symptoms appear, it’s tempting to blame the last thing you ate. But digestion rarely works that way. Ask yourself:
Was dinner unusually late?
Did I eat too quickly?
Did I overeat because I’d skipped lunch?
Did I lie down immediately afterwards?
Have I been sleeping poorly?
Have I been under more stress than usual?
Sometimes the food isn’t the whole story. The day around the meal matters just as much.
Whether you’re dealing with occasional heartburn or a heavy feeling after meals, the foundations of digestive health are remarkably similar. Many people benefit from:
Whole grains contribute to the fibre that supports overall digestive health. For example, Aashirvaad Namma Chakki 100% Khapli Atta provides about 11.4g of fibre per 100g, similar to whole wheat atta. Combined with vegetables, legumes and adequate hydration, it fits naturally into balanced meals that support everyday gut health.
Notice that none of these habits is a quick fix. They’re part of an overall pattern.
Occasional symptoms after a particularly large or late meal are common. But persistent or worsening symptoms deserve attention.
Tick the statement that best describes what you’re feeling.
Mostly Heartburn
☐ Burning behind the chest
☐ Sour taste in the mouth
☐ Worse after lying down
☐ Food seems to come back up
Mostly Indigestion
☐ Feel full very quickly
☐ Heavy after meals
☐ Upper stomach discomfort
☐ Food feels like it sits for a long time
☐ Frequent episodes of diarrhoea
Other Symptoms
☐ Bloating
☐ Burping
☐ Excess gas
☐ Constipation
Now ask yourself:
☐ Has this been happening for several weeks?
☐ Is it becoming more frequent?
☐ Is it interfering with daily life?
If the answer is yes, it’s worth discussing your symptoms with a doctor.
Seek medical advice promptly if you experience:
These symptoms require medical assessment rather than self-treatment.
Try this prompt:
“I’ve been experiencing digestive discomfort, but I’m not sure whether it’s heartburn, acidity or indigestion. Here’s my symptom diary, including where I feel discomfort, meal timings, what I ate, sleep, stress and activity levels. Can you help me identify which symptoms seem most consistent with heartburn, indigestion or another digestive pattern that I should discuss with my doctor?”
Acidity, heartburn and indigestion are closely related, but they’re not interchangeable. Acid reflux is the movement of stomach contents back into the oesophagus.
Heartburn is the burning sensation that reflux often causes. Indigestion is a broader term for discomfort such as heaviness, fullness or upper abdominal pain after eating.
Learning to tell them apart doesn’t just improve your vocabulary; it helps you notice patterns, make more targeted lifestyle changes and recognise when it’s time to seek medical advice.
Your gut doesn’t usually send random messages. The better you understand its language, the easier it becomes to respond in the right way.
If symptoms are persistent, worsening or accompanied by warning signs such as difficulty swallowing, unexplained weight loss, persistent vomiting or diarrhoea, blood in the stool or vomit, or severe chest or abdominal pain, seek medical advice promptly rather than relying on home remedies alone.
Disclaimer: This article is intended for general educational purposes only and should not be considered medical advice.
Acid reflux is stomach contents flowing back up into the oesophagus. Heartburn is the resulting chest-burning symptom. Indigestion refers to upper abdominal discomfort, heavy feelings, or getting full too quickly
Heartburn symptoms include a burning feeling behind the breastbone that moves toward the throat, a sour or bitter taste, or burning worsening after lying down or bending over.
Indigestion involves feeling uncomfortably full very quickly, a heavy feeling after meals, upper abdominal discomfort, or feeling as though food is sitting in the stomach without the classic chest-burning sensation.
Eating regular, moderate meals slowly, waiting before bedtime, staying active, drinking water, and eating high-fibre foods like Khapli atta (providing ~11.4g fibre per 100g) with vegetables and pulses support digestive health.
Seek medical advice if symptoms persist, worsen, or occur alongside difficulty swallowing, persistent vomiting, black stools, blood in vomit, unexplained weight loss, severe abdominal pain, persistent diarrhoea, or severe spreading chest pain.
