The early symptoms of gastric cancer are not obvious and easy to be ignored. The further development of symptoms can indicate the possible location of gastric cancer. For example, satiety and abdominal discomfort after meals indicate that the cancerous site is in the lower part of the stomach. Dysphagia and malabsorption of vitamins and minerals can lead to weight loss and physical weakness. Even if it does not cause other symptoms, a small amount of blood loss can cause anemia. In rare cases, patients may vomit blood or discharge tarry black stool. When the gastric cancer progresses to a certain extent, the doctor can feel a lump in the patient's abdomen. Even in the early stage, small gastric cancer may spread (metastasize) to a distant place. The spread of gastric cancer can cause hepatomegaly, jaundice, ascites and skin cancer nodules. The spread of cancer may also involve bones, making them fragile and leading to fractures. Sometimes the symptoms of gastric cancer may be confused with peptic ulcer. If after taking anti-ulcer drugs, the patient's symptoms are not relieved or there are symptoms of weight loss, it is necessary to suspect the possibility of gastric cancer.