The thyroid gland is located in the neck of human body, on the surface of the trachea. When malignant tumor occurs in this area, it mainly shows some symptoms of pressure after tumor growth and symptoms after metastasis. Special thyroid tumor can also show some systemic symptoms, such as low fever and emaciation, due to the effect of secreting special substances. The most typical symptom of thyroid malignant tumor is the lump on the surface of thyroid gland. These masses can show some pressure symptoms during the growth process. Since the thyroid is on the surface of the trachea and near the esophagus, if the tumor grows large, it may directly compress the organ, causing the airway to be unobstructed and breathing effort, and compressing the esophagus can cause the problem of difficulty in swallowing food when eating. There are some nerves around the thyroid gland, which have a more important role. Tumor compression on these tissues can cause hoarseness, abnormal tone, and even choking and coughing when drinking water. The most common route of metastasis for malignant tumors of the thyroid gland is the appearance of lymph node metastasis. Therefore, when metastasis occurs in this disease, enlarged lymph nodes can occur in the neck. These lymph node tissues collect in clusters and are not easily pushed and do not show pressure pain. In rare cases, malignant tumors of the thyroid gland can also metastasize to the lungs, causing some symptoms of cough and sputum. Some specific malignant tumors of the thyroid gland can secrete some vasoactive substances and neuroactive substances. This leads to increased vascular activity and abnormal nerve activity. Some problems such as facial flushing, diarrhea, etc. appear. These are the special manifestations of some relatively rare malignant tumors of the thyroid gland. The most common manifestation of a malignant tumor growing in the thyroid gland is a thyroid mass and the pressure and appearance that appears. However, it is not possible to judge all thyroid lumps as malignant tumors of the thyroid gland by this symptom alone. It is important to make an accurate diagnosis of the disease with the help of a doctor for early treatment.