Hypothyroidism is short for hypothyroidism. High anti-thyroid peroxidase antibodies are not necessarily hypothyroidism, and a blood test for thyroid function is still needed to diagnose hypothyroidism. High anti-thyroid peroxidase antibodies suggest that an autoimmune disease, such as Hashimoto’s thyroiditis or diffuse toxic goiter, may be occurring in the thyroid tissue. Hypothyroidism should be considered if thyroid function tests reveal elevated thyroid-stimulating hormone (TSH) and decreased free thyroxine (FT4) and free triiodothyronine (FT3). Hashimoto’s thyroiditis may cause not only hypothyroidism but also hyperthyroidism. Diffuse toxic goiter can cause hyperthyroidism. Therefore, high anti-thyroid peroxidase antibody only indicates that the patient may suffer from Hashimoto’s thyroiditis, diffuse toxic goiter, etc. It is not very related to whether the patient is suffering from hypothyroidism or not, and cannot reflect whether the patient is suffering from hypothyroidism or not. When anti-thyroid peroxidase antibodies are high, you need to go to a regular hospital for diagnosis.