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Gastroenterology is the branch of medicine focused on the digestive system and its disorders. It involves the study and treatment of the entire gastrointestinal (GI) tract, from the oesophagus and stomach to the intestines, liver, gallbladder, and pancreas. The specialty focuses on the movement of food through the digestive tract, the absorption of nutrients, and the elimination of waste from the body.

A gastroenterologist is a highly trained specialist who manages diseases of the digestive organs and liver. In India, after completing an MBBS, these doctors typically complete postgraduate training in general medicine or paediatrics, followed by super-specialisation in medical gastroenterology through a DM or DrNB programme, as applicable. They are trained to perform endoscopic procedures to visualise the internal digestive tract and provide non-surgical treatments for complex gastrointestinal and liver conditions.

A gastroenterologist can:

• Diagnose and treat chronic digestive issues such as acidity, bloating, and irritable bowel syndrome (IBS).
• Perform endoscopic procedures (gastroscopy and colonoscopy) to investigate internal bleeding or ulcers.
• Manage complex liver diseases, including fatty liver, hepatitis, and cirrhosis.
• Treat disorders of the gallbladder (gallstones) and the pancreas (pancreatitis).
• Screen for and manage gastrointestinal cancers, including stomach and colon cancers.
• Treat conditions like haemorrhoids, rectal bleeding, and anal fissures.
• Provide nutritional guidance for patients with malabsorption or inflammatory bowel diseases (IBD).
• Diagnose the underlying cause of persistent symptoms such as nausea, vomiting, or abdominal pain.

Note: Provide online consultations for suitable digestive and liver-related concerns, helping patients understand their symptoms and decide when an in-person consultation or further evaluation may be needed.

You should consider consulting a gastroenterologist for any of the following symptoms or problems:

• Persistent heartburn or acid reflux that does not improve with appropriate treatment. 
• Chronic constipation or frequent bouts of diarrhoea/loose motion.
• Unexplained abdominal pain, cramping, or severe bloating.
• Signs of blood in the stool or unexplained rectal bleeding.
• Yellowing of the eyes or skin (jaundice), which may indicate liver or biliary problems.
• Difficulty swallowing or a persistent "lump" sensation in the throat.
• Sudden, unexplained weight loss or loss of appetite.
• Recurring nausea or vomiting that interferes with daily nutrition.

Note: You should consider consulting a gastroenterologist for any of the following symptoms or problems. Online consultation may also be an option for suitable symptoms and can help you get medical guidance without delaying evaluation of persistent or recurring concerns. 

• Heartburn (GERD): A condition in which stomach acid or stomach contents flow back into the oesophagus, causing a painful burning sensation in the chest.
• Abdominal pain: Discomfort felt anywhere between the chest and groin, which can signal issues ranging from gas to gallstones.
• Nausea and vomiting: Persistent urges to vomit or the act of vomiting, which can have many causes, including infections, food poisoning, or gastrointestinal obstructions.
• Gastritis: Inflammation, or damage to the stomach lining, which may be caused by H. pylori infection, NSAIDs, alcohol, autoimmune conditions, or other factors. 
• Gallstones: Hardened deposits of digestive fluid that can form in your gallbladder, causing sharp pain in the upper right abdomen.
• Liver problems and fatty liver: Include conditions such as metabolic dysfunction-associated steatotic liver disease (MASLD), in which fat accumulates in the liver and may be associated with inflammation and fibrosis.
• Irritable bowel syndrome (IBS): A common disorder affecting the gut, causing cramping, abdominal pain, bloating, gas, and diarrhoea or constipation.
• Diarrhoea and constipation: Chronic disturbances in bowel movements that may be associated with underlying digestive disorders.
• Blood in stool and rectal bleeding: A serious symptom that may indicate haemorrhoids, anal fissures, inflammatory bowel disease (IBD), polyps, or other gastrointestinal conditions.
• Haemorrhoids: Swollen veins in the anus and lower rectum, similar to varicose veins, which can cause discomfort and bleeding during bowel movements.
• Peptic ulcer: Open sores that develop on the inside lining of the stomach or duodenum (the first part of the small intestine).

• Managing constipation: Increase your intake of soluble fibre (such as oats and fruits) and drink adequate fluids according to your individual needs to help keep stools soft and easier to pass. 
• Relieving bloating: Eat smaller, more frequent meals and chew slowly to prevent swallowing excess air; avoid carbonated drinks and artificial sweeteners.
• Fighting acidity: Avoid lying down immediately after meals; wait at least 2-3 hours before sleeping to prevent acid from refluxing into the oesophagus.
• Loose motion recovery: Use ORS to replenish lost fluids and electrolytes and continue eating nutrient-rich foods as tolerated. Avoid foods that worsen your symptoms until you recover.
• Stomach ulcer care: Avoid triggers such as NSAIDs (painkillers such as ibuprofen or aspirin) unless specifically advised by your doctor. Treatment depends on the cause, such as H. pylori infection or medication-related irritation. 
• Preventing indigestion: Maintain a food diary to identify personal triggers; common culprits can include fried foods, onions, and heavy spices.