There is no clear research on how long a 30-year-old with hyperthyroidism can live. If the patient is actively treated by a doctor to keep the thyroid hormones within a reasonable range, the life expectancy is generally not affected, but if the patient is not actively treated, the life expectancy may be shortened if there is a thyroid crisis, hyperthyroidism, heart disease and other serious complications. Patients diagnosed with hyperthyroidism at the age of 30 can follow the doctor’s instructions to take methimazole, propylthiouracil and other antithyroid drugs, or iodine radiation therapy, to control the thyroid hormones within a reasonable range, and is not accompanied by hyperthyroidism heart disease and other complications of the patients, can achieve long-term survival. If the patient does not cooperate with the doctor for active treatment, serious complications such as hyperthyroid heart disease and thyroid crisis may shorten the patient’s survival period and even threaten the patient’s life. Patients diagnosed with hyperthyroidism should actively cooperate with doctors in treatment and establish a healthy lifestyle, all of which can help improve the prognosis.