The time it takes for Hashimoto’s thyroiditis to develop is related to the patient’s physical condition, and the exact onset of the disease varies from person to person, usually taking from a few months to several decades, with no standardized criteria, although some patients may have normal thyroid function throughout their lives. Hashimoto’s thyroiditis is a common autoimmune inflammatory disease with an insidious and slow onset, and patients may have a history of the disease ranging from a few months to a few decades, depending on the patient’s physical condition. In the early stages of the disease, most patients have no obvious symptoms, except for mild enlargement of the thyroid gland and mild discomfort in the throat. As the disease prolongs, the thyroid tissue becomes damaged and hypothyroidism occurs, and patients may experience symptoms such as chills, bradycardia, and constipation. For patients with Hashimoto’s thyroiditis, it is recommended that they seek prompt medical attention and treatment under a doctor’s supervision.