If it is the early stage of subacute thyroiditis, the patient will experience a fever, mainly in the afternoon or at night.

Secondly, there is pain when bending the neck forward, and many patients feel as if they have a sore throat and thus visit the otolaryngology department.

Thirdly, in the early stages, the patient experiences transient hyperthyroidism, with symptoms such as palpitations, excessive sweating, weight loss, and insomnia.

Therefore, with these symptoms, it is advisable to promptly visit an endocrinology specialist for further thyroid function tests and thyroid ultrasound, followed by a definitive diagnosis and comprehensive treatment.