Thyroiditis generally refers to subacute thyroiditis.

It is a disease caused by the destruction of thyroid follicles due to a viral infection, leading to the release of thyroid hormones into the blood. In the early stages, some people may experience transient hyperthyroidism, with symptoms such as heat intolerance, excessive sweating, palpitations, insomnia, weight loss, and irritability. In addition to these symptoms, thyroiditis can also be accompanied by neck pain and fever, generally occurring in the afternoon or evening. Therefore, it is recommended that anyone with these symptoms should promptly visit an endocrinology specialist to complete thyroid function tests, erythrocyte sedimentation rate, routine blood tests, and thyroid ultrasound to confirm the diagnosis.