Thyroid erosion generally refers to inflammatory ulcerative changes in the thyroid gland, which may be caused by suppurative inflammation of the thyroid gland, or may be caused by inflammatory diseases around the thyroid gland, or may be caused by autoimmune diseases, and should be treated according to the cause. 1. Purulent thyroiditis: it can lead to inflammatory erosion of the thyroid gland. There may be anterior neck pain, swelling and fever, the disease progresses rapidly, abscesses expand rapidly. If not timely diagnosis and treatment, it is easy to cause respiratory and swallowing difficulties, which can be life-threatening. Clinically, it is usually treated with antibiotics, drainage and excision surgery if necessary. 2. Inflammation in other parts: the thyroid gland is located on both sides of the throat and trachea, if esophagitis, pharyngitis, etc. develop seriously, it may cause inflammation to spread and involve the tissues around the thyroid gland, resulting in thyroid erosion. Anti-inflammatory drugs need to be used under the guidance of a doctor. 3. Immune diseases: Hashimoto’s thyroiditis is an autoimmune thyroid disease because the immune system produces antibodies that attack the thyroid gland, which may cause the thyroid gland to erode. Therefore, when thyroid erosion occurs, it is necessary to consult a doctor in a timely manner, under the guidance of the doctor for treatment.