Patient: I was diagnosed with hyperthyroidism in May 2012, and after taking iodine 131 treatment, it caused hypothyroidism, what can I do to maintain my condition without medication? Answer: Hypothyroidism after radioactive iodine treatment is generally divided into permanent hypothyroidism and transient hypothyroidism, the latter is hypothyroidism that occurs within one year of radioactive iodine treatment, and most of them can recover normal nail function. The former is hypothyroidism that occurs after 1 year of radioactive iodine treatment, and most of them cannot be cured and need to take thyroxine replacement therapy for life.