The general examination of the tongue includes physical examination, laboratory examination, tissue examination and imaging examination as follows: 1. Physical examination: Hospital personnel ask patients about their family history and whether they have any medical history, and initially judge the color and texture of the tongue, whether the tongue is swollen, whether the tongue movement is restricted, and whether there is any sense of taste by visual examination of the oral cavity. At the same time, the medical staff will examine the tissues and lymphatic tissues of the patient’s neck and head to see if there are any abnormalities such as pain and swelling, in order to determine the patient’s current condition and prepare for the next step of treatment. 2. Laboratory tests: Blood is collected and routine blood tests are conducted, with reference to normal personnel level values, from which it is possible to determine whether there are any abnormalities and to further clarify the physical condition. 3. Tissue examination: use tissue taking instruments to collect tiny tissues of the tongue, and then send them to the laboratory of the research department of the hospital to determine the nature and source of direct confirmation of the diagnosis. 4. Imaging: Generally speaking, it is MRI and CT examination, through the instrument can clearly see the situation around the mouth and deep parts of the mouth, so as to better assess the involvement and severity of the disease. Tongue examination is recommended to be carried out under the guidance of a doctor, and should not be carried out indiscriminately, which may affect the condition.