What causes diarrhea when feeling anxious or stressed?

Diarrhea triggered by stress is associated with gastrointestinal neurosis and irritable bowel syndrome (IBS). Although numerous factors can cause diarrhea, some individuals experience diarrhea specifically during periods of mental stress. So, what causes diarrhea in response to anxiety or tension? Below, we address this question.

What Causes Diarrhea in Response to Anxiety or Tension?

Diarrhea induced by anxiety or tension may result from gastrointestinal functional disorders or irritable bowel syndrome (IBS). These conditions are closely linked to emotional states; patients often develop diarrhea—and sometimes abdominal pain or bloating—during periods of tension, anxiety, or emotional instability.

Patients may experience persistent gastrointestinal symptoms. Notably, they often exhibit heightened sensitivity to food types or caloric content; even minor dietary indiscretions can trigger diarrhea, abdominal distension, pain, or general discomfort. Similarly, anxiety or stress may provoke abdominal pain and diarrhea. Additionally, patients with gastrointestinal functional disorders may experience acid reflux, belching, loss of appetite, nausea, vomiting, substernal burning sensation, postprandial fullness, or upper abdominal discomfort or pain. Patients with IBS may report heartburn, nausea, vomiting, constipation, and abdominal distension.

Patients are advised to consult a gastroenterologist promptly for evaluation and appropriate diagnostic testing—including abdominal CT, gastroscopy/colonoscopy, and blood tests—to rule out organic disease. Diagnosis should be based on clinical symptom assessment, and treatment should be initiated under the guidance of a physician following definitive diagnosis.

The above outlines the potential causes of stress- or anxiety-induced diarrhea. We hope this information is helpful to you.