The necessity of surgery for gastric nodules smaller than 5 mm cannot be generalized, but depends on whether the nodule has a tendency to become malignant. In most cases, gastric nodules are caused by abnormal proliferation of the mucosa of the stomach due to gastritis. If the nodule is less than 5mm, the boundary of the nodule is relatively clear, there is no blood transportation or the phenomenon of blood transportation is not obvious, generally speaking, you can first be observed and do not need to undergo surgical treatment. However, if the nodule gradually increases in size, the border becomes blurred and the blood transportation is more abundant, it is a sign of deterioration of the nodule, and it is recommended to carry out surgical treatment in time. When uncomfortable symptoms appear, you should go to the hospital in time for relevant examinations, and under the guidance of professional doctors, timely targeted treatment to avoid aggravation of the condition. When gastric nodules are found, they should be reviewed regularly. If the nodule is larger or grows faster, it should be treated with surgery in time.