There is a certain difference between common stomachache and stomach cancer stomachache in terms of the nature of pain. Common stomachache usually has time regularity, while stomach cancer stomachache is long-term and without regularity. 1. Ordinary stomachache: Ordinary stomachache is common in non-malignant diseases such as duodenal ulcer, gastric ulcer, acute and chronic gastritis, etc. It manifests as a dull pain in the left upper abdomen, which is obvious during hunger or after meal, and can be relieved by itself in an hour or so. 2. Stomach cancer stomach pain: stomach cancer pain usually has no time regularity, mostly persistent hidden pain in the left upper abdomen, which cannot be relieved in a short time. It should be noted that it is not accurate to distinguish common stomach disease or stomach cancer by the characteristics of stomach pain, and there is a great possibility of misjudgment. It is recommended that patients should go to regular hospitals in time after the occurrence of stomach pain symptoms, follow the specialist’s diagnosis and treatment advice, make a clear diagnosis, actively cooperate with the treatment, and have regular follow-ups.