Digestive Health: Common Digestive Disorders, Symptoms, Causes, Diagnosis, Treatment and Management

Ingestion 

Digestion 

Absorption 

Excretion 

Ingestion: The first thing the digestive system does is take food in through the mouth. That process, which is called ingestion, has to happen before anything else can happen. 

Mechanical Digestion: The complex pieces of food that we eat have to be broken down to smaller pieces so that the different enzymes can digest them. This is called mechanical digestion. It begins with the chewing, or mastication, process in the mouth. It continues with the churning and mixing actions in the stomach. 

Chemical Digestion: The large molecules of carbohydrates, proteins and fats are broken down into smaller molecules that can be absorbed and used by the cells. The second is chemical digestion.   Here the complex molecules are broken down in a process known as hydrolysis. Water and enzymes break it down. Hydrolysis is sped up by digestive enzymes. 

Movements: When food particles pass from the mouth into the pharynx and then into the oesophagus after ingestion and mastication. This process is called swallowing or deglutition. The movements in the stomach are caused by the contraction of the smooth muscle. They are repeated contractions that occur normally in small portions of the digestive tract. These mix the food particles with enzymes and other fluids. The movement which propels the food particles along the digestive tract is called peristalsis. These are wave-like contractions that propel food particles through the various regions of mechanical and chemical digestion. 

Absorption: Small molecules produced by chemical digestion cross the cell membranes of the lining of the small intestine to enter the blood or lymph capillaries. This is called an absorption. 

Excretion: The molecules of food that are not digested or absorbed have to be eliminated from the body. Defecation or elimination is the passing out of the indigestible wastes from the body through the anus as faeces. 

Incomplete Digestion: Without enzymes like lactase, amylase or lipase, food is not fully broken down. Undigested food particles ferment in the gut, producing gas and bloating. 

Enzyme Deficiency: Many Indians are deficient in digestive enzymes, especially lactase and suffer from gas and discomfort from normal foods like milk and sweets.   

Slow Gut Motility: If your stomach empties slowly and your intestines push food along slowly, food can sit in your GI tract for a long time, which is a great environment for fermentation and gas build-up.   

Food Intolerance: Dairy, gluten or artificial sweeteners like sorbitol irritate the lining of the gut causing swelling and cramping. This stops the uptake of nutrients.    

Hormonal Changes: Hormonal changes take place in women during their periods, pregnancy and perimenopause. This also disrupts digestion and fluid balance, resulting in greater incidence or severity of bloating. 

Stress and the Disordered Nervous System: The vagus nerve is affected by chronic stress. It slows the gut down and reduces the production of enzymes. This imbalance of the “gut-brain axis” results in digestive problems and symptoms of bloating. 

Microbial Imbalances (Dysbiosis and SIBO): Bloating remains a problem when gas producing strains outnumber the good bacteria and when bacteria migrate into the small intestine. Bacterial Overgrowth (SIBO). These imbalances start with a slow digestive system. Enzymes, gut motility and microbial harmony are all out of sync. This malfunction not only interferes with digestion but also paves the way for gas accumulation and discomfort. 

Functional Dyspepsia (Indigestion): Most common non-severe cause. This occurs when the stomach does not empty correctly and digestive acids irritate the lining of the stomach. This may cause discomfort after eating.  

Acid reflux and Gastroesophageal Reflux Disease (GERD): When the lower oesophageal sphincter relaxes when it should not, stomach acid can pass back up the oesophagus. Some people experience epigastric pain rather than the classic heartburn. 

Gastritis: inflammation of the stomach lining, often due to Helicobacter pylori infection, alcohol abuse, long-term use of NSAIDs or stress. 

Peptic Ulcers: Open sores in the stomach or upper small intestine, usually caused by an H. pylori infection or long-term use of NSAIDs. The pain is usually sharp or gnawing and may get worse when the stomach is empty. 

Pancreatic Disorders: Pancreatitis and other pancreatic problems can cause epigastric pain that may radiate to the back, worse after eating. 

Biliary (Gallbladder) Disorders: Problems with the flow of bile or gallstones can cause pain in the epigastric region, along with vomiting, fever or sudden, severe pain. 

Pain or upper abdomen discomfort (burning, pressure, fullness or ache) 

Bloating 

Early satiety (feeling full sooner than normal) 

Burping and excessive Gas 

Nausea 

Sour or bitter taste in the mouth or slight regurgitation. 

Heartburn (burning behind the breastbone). 

Pain may be worse after eating, lying down, bending forward, or when the stomach is empty, depending on the cause. 

Stool & Breath Tests: Detects microscopic blood, abnormal bacteria (such as H. pylori), and sugar malabsorption. 

Imaging: X-rays and Johns Hopkins Medicine colorectal transit studies can be useful for the assessment of motility of food through the bowel. 

Endoscopy and Colonoscopy: Direct visualisation of the digestive tract. They are used to identify inflammation, take tissue biopsies and even perform minor surgical interventions like polyp removal. 

Diet changes: A low-FODMAP diet (low in fermentable carbs) helps reduce bloating and abdominal pain. Medications First line treatment depends on the predominant symptom. Osmotic laxatives (e.g., polyethylene glycol) for constipation (IBS-C) and antidiarrheals (e.g., loperamide) for diarrhoea (IBS-D).  

Increasing soluble fibre (e.g., psyllium) helps as well as limiting fatty foods, alcohol, and caffeine. Rifaximin, an antibiotic, is widely studied for its ability to decrease global symptoms and bloating.  

Psychological Interventions: Given the gut-brain connection, gut-directed cognitive behavioural therapy (CBT) and hypnotherapy are highly effective for refractory IBS.  

Lifestyle & Diet: The first things to try are raising the head of the bed, losing weight and avoiding trigger foods (such as spicy, acidic, high-fat foods).  

Medications: Treatment is based on the use of Proton Pump Inhibitors (PPIs) (e.g. omeprazole) and H2-receptor antagonists to reduce stomach acid production.  

Diet & Lifestyle: Often advised to eat small frequent meals, avoid fatty foods and smoking.  

Medications: Used to treat visceral hypersensitivity include acid suppressants (PPIs, H₂ blockers), prokinetics (to improve stomach emptying) and sometimes low-dose antidepressants. 

Ajwain (Carom Seeds): Helps in secretion of digestive juices    

Mint (Pudina): Cools stomach, relieves cramps    

Jeera (Cumin): It helps in curing acid reflux and helps in easy digestion   

Fennel Seeds (Saunf): Helps to get relief from bloatedness and heaviness after meals. 

Triphala: A traditional Ayurvedic herbal blend that helps support bowel regularity, enhances gut movement and promotes overall digestive health.  

Ginger (Zingiber officinale): Stimulates emptying of the stomach, improves the movement of the intestines and helps relieve bloating, nausea and indigestion.  

Asafoetida (Hing, Ferula asafoetida): A natural carminative which helps to relieve flatulence, abdominal cramps and digestive discomfort. 

Curd and buttermilk and other fermented foods help in maintaining gut bacteria balance thereby improving digestion. The greatest benefits of regular probiotic intake go to those who suffer from bloating or irregular bowel movements.  

Enzyme supplements can help digest complex carbohydrates, protein and fats to ease the load on your digestive system.  

Chew well and eat smaller portions  

Don’t lie down immediately after eating after meals take a short walk – even 10 minutes’ helps.   

Regular meal times, even on weekends  

Manage stress with breathing exercises, short breaks or light yoga. 

These steps are most effective when they are adopted slowly and sustainably, not as a quick fix but as part of a supportive routine.