Thyroid adenoma is a common and frequent clinical disease, the majority of which are benign lesions and a few are cancerous. The etiology is unclear, and the pathological changes are thyroid follicular hyperplasia and thyroid tissue swelling, with soft texture in benign cases and hard texture in malignant cases. Generally, benign thyroid adenoma will not cause much harm as long as the patient receives timely treatment, but it will cause more harm if not treated in time. The first thing you need to do is to get a good idea of what you want to do. 2. If not treated in time, as the tumor gradually increases, it will cause pressure on the tissues around the thyroid gland, which will commonly cause breathing difficulties, obstruction of swallowing, hoarseness, etc. Seriously, asphyxia may also occur. If benign thyroid adenoma is not treated in time, it may become cancerous with the gradual development of the disease, which will bring great harm to patients’ health. The possibility of cancerous transformation should be considered when the following symptoms appear: ① rapid increase of the tumor recently; ② restricted or fixed tumor activity; ③ hoarseness, breathing difficulty and other compression symptoms; ④ hard and solid tumor with rough surface; ⑤ enlarged lymph nodes in the neck. Warm tip: The harm of thyroid tumor can be big or small. For your health and your family’s peace of mind, please go to the regular hospital for medical treatment in time.