The signs of stomach cancer are not characterized by a white tongue. There are often no obvious signs in the early stage of stomach cancer. Instead, a few patients will have symptoms such as abdominal pain, weight loss, difficulty in swallowing, nausea and so on. Gastric cancer is a common malignant digestive disease with inconspicuous symptoms in the early stage, and in the middle and late stages, abdominal pain, lack of appetite, weight loss, difficulty in swallowing, nausea and vomiting, and colorless face may appear. At present, there is no research showing that stomach cancer can lead to white tongue. The causes of white tongue are more complicated, such as stagnation of food accumulation, cold phlegm blocking the lungs, etc., which may cause white tongue. If the patient has white tongue, it is not necessarily stomach cancer, and the patient can go to a Chinese medicine hospital for diagnostic examination and treatment under the guidance of a doctor.