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What are the symptoms of excessive iodine?

Sep 07, 2023 Source: Cainiu Health
Dr. Yang Ziqi
Introduction
Iodine is one of the essential trace elements for the human body. Excessive iodine generally refers to excessive iodine intake. When intake exceeds normal levels, it can significantly affect health and may lead to various diseases, including hyperthyroidism, iodine-induced hyperthyroidism, thyroid nodules, goiter, and thyroid tumors. Different diseases present with different symptoms. A detailed analysis is as follows:

Iodine is one of the essential trace elements for the human body. Excessive iodine generally refers to excessive iodine intake. Once the intake exceeds normal levels, it can significantly affect health and may lead to various diseases, including hyperthyroidism, iodine-induced hyperthyroidism, thyroid nodules, goiter, and thyroid tumors. Different diseases present with different symptoms. A detailed analysis is as follows:

1. Hyperthyroidism

Excessive iodine intake may cause over-secretion of thyroid hormones, leading to hyperthyroidism, which manifests as palpitations, hand tremors, and neck swelling. Patients can take medications such as propylthiouracil tablets or methimazole tablets under medical guidance. Adequate rest and a low-iodine diet are recommended.

2. Thyroid Nodules

Prolonged excessive iodine intake may trigger autoimmune destruction of thyroid tissue, resulting in thyroiditis, thyroid enlargement, and abnormal thyroid function. This may lead to breathing difficulties and coughing. Patients may take medications such as ibuprofen sustained-release capsules or indomethacin capsules as directed by a physician.

3. Iodine-Induced Hyperthyroidism

Iodine-induced hyperthyroidism typically occurs in elderly individuals and is less common in children. Main symptoms include palpitations, excessive sweating, increased bowel movements, and weight loss. It may be accompanied by thyroid nodules but usually without exophthalmos (protruding eyes). Older patients may also experience drowsiness and weakness. Treatment may include methimazole or propylthiouracil under medical supervision.

4. Goiter (Thyroid Enlargement)

Excessive iodine intake can cause goiter. Symptoms may include hoarseness, difficulty breathing, difficulty swallowing, palpitations, increased appetite, diarrhea, insomnia, and irritability. Excess iodine inhibits the activity of thyroid peroxidase, triggering compensatory thyroid enlargement. Medications such as propylthiouracil or methimazole may be prescribed under medical guidance.

5. Thyroid Tumors

Excessive iodine intake increases the risk of papillary thyroid cancer, whereas insufficient iodine intake is associated with follicular thyroid cancer. Common symptoms of thyroid tumors include local swelling, difficulty swallowing, breathing difficulties, pressure-related pain, hoarseness, and abnormal thyroid hormone secretion. Individuals experiencing these symptoms should seek timely medical evaluation to avoid delayed diagnosis and treatment.

In summary, symptoms caused by excessive iodine intake may stem from multiple conditions. Therefore, individuals experiencing the above symptoms should promptly visit a hospital for proper diagnosis and treatment under professional medical guidance.


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