[1] This can occur by vigorous repeated palpation (as with thyroid examination) or surgical manipulation (as can occur with radical neck dissection).
It is a type of subacute thyroiditis.
Pathology shows multifocal granulomatous folliculitis.
There may be initial transient hyperthyroidism due to leakage of preformed thyroid hormone in blood.
[2][3] This article about an endocrine, nutritional, or metabolic disease is a stub.