Acidity and Acid Reflux: Causes, Symptoms, Treatment & When It Stops Being Normal
Introduction
After a heavy meal, a burning sensation rises in your chest. You reach for an antacid, it settles down, and you forget about it. The next evening, it happens again. A week later, the same. Before long, the antacid packet is a permanent fixture on your bedside table, your office desk, and in your bag. Sound familiar? If it does, you are far from alone. Acidity is arguably the most universal digestive complaint in India. Survey after survey consistently shows that a significant proportion of the Indian adult population experiences acidity symptoms at least once a week — and millions experience it daily. The combination of spicy food, irregular mealtimes, high stress, and sedentary lifestyles makes acidity almost an occupational hazard of modern Indian life. But here is what most people do not know — occasional acidity and chronic acid reflux are two very different things. One is a common, manageable inconvenience. The other is a medical condition called Gastroesophageal Reflux Disease, or GERD, that can cause serious long-term damage to your oesophagus if left untreated. In this comprehensive guide, Dr. Hamikchandra Patel — gastroenterologist and laparoscopic surgeon at Shaleen Multi Speciality Hospital, Sola, Ahmedabad — explains everything you need to understand about acidity and acid reflux: what causes it, how to recognise when it has crossed a line, and what your treatment options are.Understanding Acidity — What is Actually Happening in Your Body?
To understand acidity, you first need to understand how your stomach works. Your stomach produces hydrochloric acid — a powerful digestive fluid that breaks down the food you eat and kills harmful bacteria. The stomach lining is specially designed to withstand this acid. However, the oesophagus — the food pipe that connects your mouth to your stomach — is not protected in the same way. Between the oesophagus and the stomach sits a muscular valve called the lower oesophageal sphincter (LOS). Under normal circumstances, this valve opens to allow food to pass into the stomach and then closes tightly to prevent stomach acid from flowing back upward. Acidity occurs when this valve weakens, relaxes inappropriately, or malfunctions — allowing stomach acid to escape upward into the oesophagus. The acid then irritates the sensitive lining of the oesophagus, producing the familiar burning sensation in the chest or throat that we call heartburn or acidity. When this happens occasionally after a heavy meal or a particularly spicy dish, it is normal and not a cause for concern. When it happens consistently — two or more times per week over a period of weeks — it qualifies as Gastroesophageal Reflux Disease (GERD), a chronic condition that requires proper medical evaluation and treatment.
What is the Difference Between Acidity, Acid Reflux, Heartburn, and GERD?
These four terms are often used interchangeably, but they are not quite the same thing: Acidity: A broad, colloquial term used in India to describe the general sensation of excess acid in the stomach or chest. It covers everything from mild post-meal discomfort to chronic reflux symptoms. Acid reflux: The specific physical process of stomach acid flowing backward into the oesophagus. It is the mechanism behind the symptom. Heartburn: The burning sensation in the chest or throat that results from acid reflux. It is a symptom, not a disease. The name is misleading — it has nothing to do with the heart. GERD (Gastroesophageal Reflux Disease): A diagnosed chronic medical condition characterised by persistent, frequent acid reflux that occurs more than twice a week and causes ongoing symptoms and potentially damage to the oesophageal lining. GERD requires medical treatment beyond lifestyle changes alone.What Causes Acidity and Acid Reflux?
Acidity can be triggered or worsened by a wide range of factors — dietary, lifestyle-related, physiological, and medication-related. Understanding your personal triggers is an important part of managing the condition. Dietary triggers: Spicy food, oily and fried food, citrus fruits, tomatoes, onions, garlic, chocolate, carbonated beverages, tea, and coffee are among the most common dietary triggers for acid reflux. These foods either increase acid production, relax the lower oesophageal sphincter, or both. Eating habits: Eating large meals, eating too quickly, lying down immediately after eating, or skipping meals and then overeating in one sitting all increase the risk of acid reflux. Excess body weight: Obesity is one of the strongest risk factors for GERD. Excess abdominal fat puts physical pressure on the stomach, pushing acid upward into the oesophagus more easily. Smoking: Nicotine directly weakens the lower oesophageal sphincter and increases stomach acid production. Smokers have significantly higher rates of GERD than non-smokers. Alcohol: Alcohol relaxes the lower oesophageal sphincter, stimulates stomach acid secretion, and directly irritates the oesophageal lining — a triple trigger for acid reflux. Hiatus hernia: A condition where part of the stomach pushes up through the diaphragm into the chest cavity. Hiatus hernia significantly weakens the lower oesophageal sphincter and is one of the most common structural causes of chronic GERD. Medications: Certain commonly used medications can worsen acid reflux, including aspirin and other NSAIDs (like ibuprofen), certain blood pressure medications, antidepressants, and osteoporosis drugs. If you are on long-term medication and experiencing frequent acidity, discuss this with your doctor. Pregnancy: Hormonal changes during pregnancy relax the lower oesophageal sphincter, and the growing uterus puts upward pressure on the stomach — making heartburn and acid reflux extremely common in the second and third trimesters. Stress and anxiety: While stress does not directly cause acid reflux, it heightens the perception of pain and discomfort and can trigger or worsen symptoms through indirect physiological mechanisms including changes in gut motility and acid secretion.Symptoms of Acidity and GERD
The symptoms of acidity and acid reflux range from the very familiar to some that are not immediately associated with the digestive system: Heartburn: The classic symptom — a burning sensation in the centre of the chest, typically starting behind the breastbone and sometimes rising toward the throat. It often worsens after eating, when lying down, or when bending forward. Regurgitation: A sour or bitter-tasting fluid rising into the back of the throat or mouth. Sometimes described as a wet burp. In severe cases, partially digested food comes back up. Bloating and belching: Excess gas, a feeling of fullness, and frequent burping — particularly after meals. Nausea: Particularly in the mornings or after eating, especially when GERD is associated with delayed stomach emptying. Dysphagia (difficulty swallowing): A sensation of food getting stuck in the throat or chest while swallowing. This symptom, when present, should always be evaluated promptly as it can indicate oesophageal narrowing from long-standing GERD. Chronic cough: A persistent dry cough, particularly at night, that does not respond to standard cough treatment. Many people do not realise that acid reflux can irritate the airways and trigger a chronic cough without any prominent heartburn. Hoarseness or sore throat: Acid reaching the throat and voice box can cause persistent hoarseness, a feeling of a lump in the throat (globus sensation), and chronic throat clearing — often misdiagnosed as a throat infection. Worsening asthma: In patients with pre-existing asthma, GERD can trigger or significantly worsen asthmatic symptoms. If your asthma seems poorly controlled despite medication, GERD may be a contributing factor worth investigating.When Does Acidity Stop Being Normal?
This is perhaps the most important question in this entire article — and the one that most people do not have a clear answer to. Occasional acidity is normal. A heavy dinner, a celebration with rich food, a particularly stressful week — these are all situations where temporary acidity is expected and does not indicate any underlying condition. However, you should consult a gastroenterologist without delay if: You experience heartburn or acid reflux symptoms two or more times per week consistently. Your symptoms are not adequately controlled by over-the-counter antacids. You are taking antacids daily or several times a week for more than two weeks. You experience difficulty or pain while swallowing. You notice unintentional weight loss alongside your acidity symptoms. You experience persistent nausea or vomiting. You notice black or tarry stools, or blood in your vomit — these indicate bleeding in the digestive tract and require immediate emergency attention. You are above 40 years of age and experiencing new, persistent acidity symptoms for the first time. You have a long history of GERD and have not had a recent endoscopy to monitor your oesophageal health. Persistent, untreated GERD causes real damage to the oesophagus over time and carries the risk of serious complications including oesophagitis, Barrett's oesophagus, and oesophageal strictures.Complications of Untreated Chronic Acid Reflux
This is the section that transforms casual acidity sufferers into patients who take their condition seriously: Oesophagitis: Chronic acid exposure inflames and erodes the lining of the oesophagus, causing ulcers, bleeding, and pain. Left untreated, it worsens progressively. Oesophageal stricture: Repeated damage and healing of the oesophageal lining causes scar tissue to build up, narrowing the oesophagus over time. This leads to increasing difficulty swallowing and requires endoscopic dilation to treat. Barrett's oesophagus: A potentially serious condition in which the normal lining of the lower oesophagus is replaced by abnormal cells — a direct response to long-term acid damage. Barrett's oesophagus is a recognised precursor to oesophageal cancer and requires regular endoscopic surveillance. Oesophageal cancer (adenocarcinoma): Long-standing, untreated GERD — particularly when it progresses to Barrett's oesophagus — carries an increased risk of oesophageal cancer. This is one of the most serious reasons why persistent GERD should never be left unmonitored. These complications are not inevitable — but they are real, and they are preventable with timely diagnosis and appropriate treatment.How is GERD Diagnosed?
Clinical evaluation: In most cases, a detailed history of your symptoms is sufficient for an initial diagnosis of GERD. Your doctor will ask about the frequency, duration, and character of your symptoms, your dietary and lifestyle habits, and your medication history. Upper GI Endoscopy (OGD Scopy): The most important diagnostic tool for GERD evaluation. A thin, flexible camera is passed through the mouth into the oesophagus, stomach, and duodenum, allowing direct visualisation of any inflammation, ulcers, strictures, or Barrett's changes. Dr. Hamikchandra Patel performs upper GI endoscopy at Shaleen Multi Speciality Hospital, Sola, Ahmedabad. pH monitoring: A small probe placed in the oesophagus measures the actual amount of acid exposure over a 24-hour period. This is particularly useful when symptoms are atypical or when endoscopy results are inconclusive. Barium swallow study: An X-ray-based test where you swallow a barium contrast solution, making the oesophagus and stomach visible on X-ray. Useful for identifying hiatus hernia and oesophageal strictures. Oesophageal manometry: Measures the pressure and function of the lower oesophageal sphincter and oesophageal muscles. Used when surgical treatment is being considered.


