Heavy Eating and Excessive Drinking: Unknowingly Harming Your Stomach and Intestines

After the Songkran festival, when many people have long holidays to travel home, tour, and spend time with family or friends, a popular activity is indulging in feasts and social drinking. This often involves fried and fatty foods, eating large amounts quickly, consuming alcohol, and late-night eating before bed—without realizing these behaviors continuously strain the digestive system.

Initially, symptoms may be mild, such as bloating, fullness, or frequent burping. But if ignored over time, the risk of various digestive diseases increases, including acid reflux, gastritis, irritable bowel syndrome, or even pancreatitis. This article explores which eating habits overwork digestion and how to adjust behaviors to maintain long-term digestive health.

How does the digestive system work after eating?

Once we eat, the body immediately begins digestion, with the stomach and intestines playing key roles.

• How the stomach works

When food enters the stomach, it contracts and secretes acid and digestive enzymes to transform solid food into liquid, initiating protein digestion and passing food to the small intestine. This process takes about 2 to 4 hours depending on the type and amount of food. Eating excessive amounts or high-fat foods makes the stomach work harder and slows digestion.

• Digestion and contraction of the intestines

After food passes into the small intestine, nutrient absorption begins. The intestines contract rhythmically (peristalsis) to move food along the digestive tract. Frequent digestive strain from poor eating habits can disrupt digestion and intestinal motility.

Warning signs often overlooked

Digestive symptoms often develop gradually, causing many to overlook bodily warning signs. Though these symptoms may seem mild, frequent or chronic occurrence can signal digestive disorders such as:

• Bloating and fullness after meals
• Heartburn
• Abdominal pain after eating
• Frequent burping or excessive gas
• Irregular bowel movements, alternating constipation and diarrhea

Diseases linked to heavy eating and excessive drinking

• Gastroesophageal reflux disease (GERD) occurs when stomach acid flows back into the esophagus, causing heartburn, sour burping, or chest pain.
• Gastritis is inflammation of the stomach lining, often caused by spicy foods, alcohol, irritation, and excessive acid secretion.
• Stomach ulcers may develop from chronic gastritis, causing persistent abdominal pain or gastrointestinal bleeding.
• Irritable bowel syndrome can result from poor eating habits, accumulated stress, and insufficient rest, leading to abnormal intestinal sensitivity and symptoms like abdominal pain, bloating, diarrhea, or constipation.
• Pancreatitis is strongly linked to heavy alcohol consumption and causes severe abdominal pain requiring urgent medical diagnosis and treatment.

How to adjust eating habits for balanced digestion?

Digestive care can start with daily behavioral adjustments such as:

• Eating meals on time and chewing food thoroughly.
• Avoiding overly large meals.
• Reducing intake of fatty and spicy foods.
• Limiting alcohol consumption.
• Increasing dietary fiber through vegetables and fruits.
• Exercising regularly to stimulate digestive function.

When should you see a doctor?

Proper evaluation helps identify disease causes and plan targeted treatment. If you experience any of the following digestive symptoms, consult a doctor for diagnosis:

• Chronic abdominal pain
• Vomiting blood
• Black stools
• Unexplained weight loss
• Acid reflux symptomsThatDo not improve with medication

Maintaining digestive health begins with balanced eating habits: eating on time, chewing thoroughly, reducing fatty foods and alcohol, and monitoring abnormal symptoms. If you experience chronic abdominal pain, heartburn, vomiting blood, or black stools, consult a doctor promptly for proper diagnosis and early treatment of digestive diseases.

Information provided by : Dr. Natthida Sribuathong, gastroenterologist and hepatologist, Phyathai 2 Hospital