Iodine deficiency generally refers to iodine deficiency disease, there is no such thing as the fastest way to replenish iodine, patients can consume more iodine-rich foods, and if necessary, they can take potassium iodide and other drugs for treatment. 1. Dietary prevention and treatment: patients with iodine deficiency can increase the intake of iodine in their life, and eat more iodine-rich foods, including kelp, seaweed, sea fish, etc., which can help the recovery of the disease. 2. Medication: Patients can take medication to supplement iodine when necessary, commonly used medications include potassium iodide, compound iodine solution, etc. However, the process of iodine supplementation must be under the guidance of a professional physician to prevent oversupplementation of iodine leading to the occurrence of hyperthyroidism. Deficiency of early no obvious clinical symptoms, iodine deficiency of a very small number of significantly enlarged thyroid gland can appear compression symptoms, such as breathing difficulties, swallowing difficulties, hoarse voice, irritating cough and so on. Iodine deficiency patients need to go to the regular hospital in a timely manner under the guidance of a professional physician for treatment, so that the condition can be most effectively controlled.