Digestive Symptoms: Stomach Pain, Bloating, and Heartburn Explained
Stomach pain is one of the most common reasons people visit a doctor. But abdominal pain comes in many forms: sharp pain in the middle, a dull heaviness after eating, cramps that resolve on their own. Figuring out when it's serious versus when a dietary change is all you need isn't always straightforward. This article covers common digestive symptoms — what they might mean, when to see a doctor, and when to call an ambulance.
Stomach pain: when is it serious
The abdomen is a large space. It houses the stomach, intestines, liver, gallbladder, pancreas, kidneys, and bladder. The same pain in the lower right abdomen could be appendicitis, gas pain, or an ovarian problem. That's why the character of the pain matters.
Pain that requires prompt medical attention:
- sharp, severe, sudden-onset pain — especially if you've never experienced it before;
- pain that gradually worsens over several hours;
- pain in the lower right abdomen — especially with fever;
- pain that doesn't resolve within 6 hours;
- pain accompanied by vomiting that brings no relief;
- dark stools or blood in stools or vomit.
A dull ache after a fatty meal, discomfort after overeating, mild cramps from stress — that's a different story. Unpleasant, but usually not urgent.
Bloating and gas — normal or a symptom
Intestinal gas is normal. Every day, the gut produces between 0.5 and 1.5 litres of gas. The problem is either too much gas being produced, or difficulty expelling it.
The most common causes of bloating are usually nothing to worry about:
- overeating or eating too quickly;
- carbonated drinks;
- large amounts of legumes, cabbage, or raw vegetables;
- lactose or gluten intolerance;
- stress — the gut is extremely sensitive to nervous tension.
But if bloating is constant, accompanied by pain, irregular stools, and weight loss — that's a reason to see a gastroenterologist. These symptoms can point to irritable bowel syndrome, coeliac disease, or inflammation.
Diarrhoea and constipation
Diarrhoea. Acute diarrhoea (lasting up to 3–5 days) is most often caused by a gut infection or food poisoning. It's managed with rest, plenty of fluids, and anti-diarrhoeal medication if needed. The main danger is dehydration, especially in children and older adults.
See a doctor if:
- diarrhoea lasts more than 3 days;
- there is blood or mucus in your stools;
- your temperature rises above 38.5°C (101.3°F);
- you have signs of dehydration: dry mouth, dizziness, dark urine.
Constipation. Constipation means fewer than three bowel movements per week, or difficult and painful ones. Common causes include insufficient water and fibre, a sedentary lifestyle, and stress. If constipation lasts more than two weeks or is accompanied by pain and bleeding, consult a doctor.
Heartburn and acid reflux
Heartburn is a burning sensation in the chest that occurs when stomach acid flows back into the oesophagus. Most people experience it occasionally, particularly after fatty, acidic, or spicy food, and after alcohol.
If heartburn occurs less than twice a week, it's usually a dietary issue. If it's more frequent, it's likely gastro-oesophageal reflux disease (GORD/GERD), which requires treatment.
Pay attention if:
- heartburn persists even on an empty stomach;
- you have difficulty swallowing;
- pain radiates to your back or left shoulder — this might not be heartburn but your heart;
- you've had unexplained weight loss.
Gastritis symptoms are similar: pain or discomfort in the upper abdomen, nausea, heaviness after eating. If gastritis or an ulcer is suspected, a doctor will order a gastroscopy — uncomfortable, but informative.
When to call an ambulance (acute abdomen)
"Acute abdomen" is a medical term for a group of conditions requiring urgent surgical care. Call emergency services immediately if:
- the abdominal pain is sharp, unbearable, and came on suddenly;
- the abdomen has become rigid, board-like;
- pain is accompanied by high fever (above 38.5°C) and vomiting;
- there is blood in vomit or black, tarry stools (signs of internal bleeding);
- pain intensified after a brief period of relief — this is a warning sign.
Appendicitis, a perforated ulcer, bowel obstruction, a ruptured cyst — all are acute surgical emergencies. When in doubt, call an ambulance.
Which doctor to see for digestive problems
The first step is a general practitioner (GP). They will examine you, order basic tests, and refer you to a gastroenterologist if needed. Go directly to a gastroenterologist if:
- symptoms recur regularly;
- you've already been evaluated and have a diagnosis (gastritis, GORD, IBS);
- you need a gastroscopy or colonoscopy.
For acute pain, especially with fever or blood — go to a surgeon or emergency room, bypassing the GP.
If you're not sure which doctor to see, try describing your symptoms to the assistant. It will help you understand how urgently you need care and which specialist to see.
Frequently asked questions
Why does my stomach hurt in the morning before eating?
Pain on an empty stomach is a common symptom of gastritis or a duodenal ulcer. Stomach acid irritates the inflamed lining when the stomach is empty. If this happens regularly, see a doctor and consider a gastroscopy.
Why does heartburn happen at night?
In a horizontal position, stomach acid flows more easily into the oesophagus. If nighttime heartburn bothers you, try avoiding food for 3 hours before bed and elevating the head of your bed slightly. If that doesn't help, consult a doctor.
Is stomach gurgling normal?
Yes, gurgling (borborygmi) is normal gut activity. The digestive system continuously moves its contents along, which makes noise. It's louder on an empty stomach or during a gut infection, but on its own it is not a symptom of disease.
Can stress cause stomach problems?
Yes. The gut is often called the "second brain" — it is directly connected to the nervous system. Under stress, the gut can speed up or slow down, causing diarrhoea, constipation, bloating, and pain. This is known as irritable bowel syndrome (IBS).
Should I fast when my stomach hurts?
For severe acute pain — don't eat anything and call an ambulance or go to the emergency room. For mild discomfort from suspected overeating or infection, switch to light foods: plain rice water, unsweetened tea, dry toast. Don't fast for more than a day without a doctor's advice.
What is irritable bowel syndrome?
IBS is a functional bowel disorder: pain, bloating, and irregular stools without any organic changes (meaning tests and endoscopy come back normal). It affects roughly one in five people. Treatment includes dietary adjustments, stress management, and medication when needed. Diagnosis is made by a gastroenterologist.
Symptomatica is an informational reference service. Not a medical service; does not diagnose or prescribe treatment. For any symptoms, please consult a doctor.