The treatment of high free thyroxine depends mainly on the cause of its origin. In the case of mild high free thyroxine but normal thyroid stimulating hormone, you can consider making reasonable adjustments in your daily diet by consuming more iodine-rich foods such as kelp, seafood and fish. If the free thyroxine is high due to subacute thyroiditis or Hashimoto’s thyroiditis, you should go to the hospital in time for the corresponding examination. The patient’s hormonal parameters, disease and symptoms usually require reasonable chemotherapy and, if necessary, appropriate thyroid medication. Hyperthyroidism can also cause high free thyroxine, which can be treated with hyperthyroidism medications, such as propylthiouracil and Sage. Since there are many factors that can cause high free thyroxine, it is not possible to make a generalization and a reasonable treatment plan is usually needed under the guidance of a doctor.