Hyperthyroidism and hypothyroidism do not mean that the condition has become serious, it may be related to the overdose of anti-thyroid drugs, hyperthyroidism combined with Hashimoto’s thyroiditis or subacute thyroiditis. 1. drug overdose: hyperthyroidism medication into hypothyroidism, considering the possibility of taking too much anti-thyroid medication, due to the effect of the drug caused by a transient hypothyroidism, it is recommended to consult a doctor in a timely manner, in the doctor’s guidance to adjust the dosage of hyperthyroidism medication. 2. Hyperthyroidism combined with Hashimoto’s thyroiditis: If hyperthyroidism is combined with Hashimoto’s thyroiditis, hyperthyroidism can be seen in the early stage of the disease, and then hypothyroidism occurs due to the progression of the disease, and Hashimoto’s thyroiditis needs to be actively treated with levothyroxine hormone replacement under the guidance of the doctor. 3. Subacute thyroiditis: Patients with subacute thyroiditis have thyroid hormones released into the bloodstream because the thyroid gland is destroyed, and the disease is characterized by hyperthyroidism in the early stages, which can lead to hypothyroidism if anti-hyperthyroidism drugs are taken. The patient should consult the doctor in time, complete the relevant examinations, and be treated with non-steroidal anti-inflammatory drugs or glucocorticosteroids if necessary. When abnormal thyroid function occurs, it is necessary to go to the endocrinology department in a timely manner, under the guidance of the doctor for treatment.