Overactivity and underactivity of the thyroid gland may result in alterations in skin, hair or the nails. This may be as a result of the abnormal level of thyroid hormone, or a consequence of an underlying condition.
DermNet has divided these conditions into two topics:
- Hypothyroidism (too little thyroid hormone)
- Hyperthyroidism (too much thyroid hormone)
Euthyroid refers to a normal amount of thyroid hormone.