In the initial phase of damage to the gland, preformed thyroid hormone will 'fall out' of the damaged cells. This leads to symptoms and biochemistry of an overactive thyroid (feels hot, trembly, anxious, loses weight, fast heart rate, sweaty, greasy hair), with raised free T3 and free T4, and a suppressed thyroid stimulating hormone (TSH) value. The damaged cells will no longer be able to take up iodine in order to manufacture further supplies of thyroid hormone, and thus in due course the patient comes to experience the symptoms of an underactive thyroid (feels cold, tired,<unk> pressed, gains weight, dry skin and hair) with low free T3 and free T4, and eventually increased TSH.
De Quervain's thyroiditis
Ord's thyroiditis
Riedel's thyroiditis
Hashimoto's thyroiditis
Subacute thyroiditis
Radiation-induced thyroiditis
Subacute lymphocytic thyroiditis
Thyroid lymphoma