Cutaneous manifestations of thyroid diseases can be divided into three groups:
1-Specific lesions such as the thyroglossal duct cyst and cutaneous metastases form thyroid malignancy.
2-Nonspecific signs secondary to thyroid hormone imbalance.
3-Cutaneous signs of associated systemic and dermatologic disorders.
This review constitutes a summary and update of the cutaneous manifestations of thyroid diseases.