What conditions should you avoid with iodine?

Iodine should be avoided in individuals with a known allergy to iodine or shellfish, as these Allergies can trigger severe reactions. It should also be used cautiously in those with thyroid disorders, such as hyperthyroidism or Hashimoto's thyroiditis, since excessive iodine can exacerbate these conditions. Additionally, individuals with renal impairment should avoid iodine-based contrast agents, as they can worsen kidney function. Always consult a healthcare professional before using iodine if you have any of these conditions.