Functional gastrointestinal disease generally refers to a series of uncomfortable manifestations caused by gastrointestinal dysfunction, but there is no organic lesion. The causes, symptoms and treatments of this disease are as follows: 1. Causes: Functional gastrointestinal disorders can be caused by a variety of factors, including an acute intestinal infection, family genetics, and abnormal autonomic function. 2. Symptoms: Functional dyspepsia may occur in patients, mostly manifested as postprandial fullness, early satiety, epigastric pain and burning sensation, etc. Symptoms of irritable bowel syndrome (IBS), such as abdominal pain, diarrhea, or constipation, etc., can also occur. Some of the patients may also be accompanied by different degrees of psychosocial anomalies, such as insomnia, headache, anxiety, and depression. 3. Treatment: patients can follow the doctor’s instructions to use gastric power drugs for treatment, such as domperidone tablets, Itopride tablets, etc., but also the use of antispasmodic drugs for treatment, such as Trimethoprim tablets, pivoxil bromide tablets, etc., if the patient has diarrhea, but also the use of antidiarrheal drugs for treatment, such as loperamide tablets, montelukast, etc.. Diagnosis of functional gastrointestinal disease must first improve the relevant laboratory tests except organic lesions, should be timely to the hospital for medical treatment, diagnosis and treatment as prescribed by the doctor.