Antithyroglobulin antibody over 800IU/ml suggests that the value is high and abnormal whether it is serious or not, which may be due to Hashimoto’s thyroiditis, hyperthyroidism, thyroid cancer and other diseases. The normal value of anti-thyroglobulin antibodies is <60IU/ml (chemiluminescence method), and the reference range given by different hospitals is slightly different. Elevated anti-thyroglobulin antibodies are a characteristic laboratory indicator of Hashimoto's thyroiditis, suggesting the presence of an auto thyroid dysfunction. In addition, hyperthyroidism can also increase the value of thyroglobulin antibodies. Diseases such as follicular thyroid cancer and papillary thyroid cancer may present with significantly elevated anti-thyroglobulin antibodies, which often suggests that the patient's condition is serious and requires a doctor's diagnosis. It is recommended that patients with abnormal thyroglobulin values go to the hospital promptly.