Gastrointestinal endoscopy is widely acknowledged as the most useful tool for diagnosing and treating gastrointestinal mucosal lesions. It can not only observe the mucosa directly, but also obtain tissue biopsy for pathological diagnosis. Although the importance of gastrointestinal endoscopy has been well understood, there are still a certain proportion of people who are unwilling to undergo it due to the discomfort and anxiety during the procedures. Music is multifunctional, which can alleviate people's depression, anxiety and other negative emotions as well as help to maintain good mental health. Thus, in this study we aim to investigate the role of music listening in gastrointestinal endoscopy in a randomized controlled clinical trial, especially for those patients who plan to undergo therapeutic endoscopic procedures and try to improve the patients' experience.

This is a randomized controlled trial to examine the function of music listening in the procedures of gastrointestinal endoscopy. It was previously reported that music listening may exert beneficial effects for patients who undergo gastrointestinal endoscopy. However, most of the studies did not analyze the effects of the specific music type and listening time in diagnostic and therapeutic gastrointestinal endoscopic procedures, respectively. This study will test whether the specific music type and listening time before gastrointestinal endoscopy could improve patients' experience of the procedure in a randomized controlled trial. The results may help to optimize the routine clinical practice at present.

Inclusion Criteria:

• Above 18 years old patients
• Who agree to participate in the study
• Patients with the indications for gastrointestinal endoscopy

Exclusion Criteria:

• Patients, who were receiving nonsteroidal anti-inflammatory drugs, pump inhibitors (PPI) or antibiotics in the last 3 weeks.
• Severe uncontrolled coagulopathy
• Pregnancy and lactation