Gastric mucosa biopsy of gastric sinus is also called gastric mucosa biopsy, through which the nature of the lesion tissue can be clarified and the occurrence of cancer can be judged. Gastric mucosa biopsy is to use biopsy forceps to extract part of gastric mucosa during gastroscopy, and then send the pathological tissue for pathological examination, which can obtain pathological diagnosis of the diseased tissue, clarify the nature of the lesion, and determine whether cancer has occurred or not, and even if cancer has not occurred, it can also determine whether there is intestinal epithelial hyperplasia, gastric mucosal atrophy and so on, and it can also clarify the degree of hyperplasia, etc. In addition, it can also play a role in determining the prognosis of the disease. Besides, gastric mucosa biopsy can also determine the prognosis of the disease. It should be noted that gastric mucosal biopsy is not recommended for people with poor blood clotting function. Patients who need to do gastric mucosal biopsy are recommended to do it under the guidance of a doctor.