Hyperthyroidism is the short form of hyperthyroidism, and a 9-year-old child with hyperthyroidism can be treated through general treatment, medication, radioactive iodine treatment, and surgical removal. 1. General treatment: 9-year-old children with hyperthyroidism, diet should reduce the intake of iodine, avoid eating kelp, seaweed and other iodine-rich foods, you can eat more high-energy, high-protein, high-vitamin diet to compensate for its consumption, improve the nutritional status of the whole body. 2. Medication: After diagnosed with hyperthyroidism, you can take oral anti-thyroid medication, such as propylthiouracil, etc., under the doctor’s advice. 3. Radioactive iodine therapy: If the effect of drug treatment is not good, you can treat hyperthyroidism with iodine 131 under the guidance of your doctor. This method is simple, economical and has a high cure rate, but patients may experience hypothyroidism and may need to take levothyroxine for life for replacement therapy. 4. Surgery: For hyperthyroidism patients with obvious swelling of the thyroid gland, or with symptoms of pressure, surgical resection can be taken as a treatment. For 9-year-olds with hyperthyroidism, it is recommended that they go to the hospital for relevant examinations accompanied by their parents and under the guidance of the doctor for the next step of treatment.