Why does poor mood affect the gastrointestinal system?

Generally, poor emotional states can affect gastrointestinal health due to factors such as changes in eating habits, autonomic nervous system dysfunction, hormonal imbalances, weakened spleen and stomach function, and decreased immunity.

1. Changes in eating habits: When feeling emotionally down, individuals may tend to choose high-sugar, high-fat, or spicy foods for temporary comfort, or may experience loss of appetite, binge eating, and other irregular eating behaviors. These unhealthy habits increase the burden on the gastrointestinal system and may lead to digestive problems.

2. Autonomic nervous system dysfunction: Emotional states are closely linked to the autonomic nervous system. Negative emotions can disrupt its normal functioning—particularly the vagus nerve—leading to gastrointestinal dysfunction. This may cause excessive gastric acid secretion, disordered gastrointestinal motility, and symptoms such as stomach pain, acid reflux, and heartburn.

3. Hormonal imbalances: Emotional fluctuations can disturb the balance of the endocrine system, especially hormones related to digestion. Poor mood may lead to imbalanced hormone secretion—for example, increased adrenaline—which in turn affects gastrointestinal motility and secretory functions.

4. Weakened spleen and stomach function: Poor emotional states can impair the digestive and metabolic functions of the spleen and stomach, resulting in functional weakness. This may cause indigestion, loss of appetite, bloating, and, in severe cases, chronic gastritis or gastric ulcers.

5. Decreased immunity: Poor emotional health may reduce overall immunity, making the gastrointestinal tract more vulnerable to bacterial and viral infections. This increases the risk of gastrointestinal diseases such as acute gastritis and enteritis.

In daily life, it's important to develop healthy habits. Avoiding extreme emotional fluctuations, maintaining a calm mindset, and ensuring emotional stability contribute significantly to gastrointestinal health.