Diffuse thyroid lesions are an ultrasound description of thyroid lesions, which can be seen in Hashimoto’s thyroiditis, Graves’ disease, etc. Most of them are benign, and if they do not affect the thyroid function, they are usually not serious. 1. Hashimoto’s thyroiditis: an autoimmune thyroid disease, ultrasound suggests diffuse thyroid lesions, can be manifested as normal thyroid function or hypothyroidism, generally not serious, normal thyroid function can be temporarily untreated, hypothyroidism can be prescribed the use of levothyroxine sodium tablets alternative treatment. 2. Graves disease: is also an autoimmune thyroid disease, often manifested as hyperthyroidism, the thyroid gland is often diffusely enlarged, most of the Graves disease is not serious, the use of methimazole and other medications as prescribed by the doctor for treatment, for the serious condition, severe enlargement or pressure symptoms can be treated with iodine 131 therapy or surgical treatment. Diffuse lesions of the thyroid gland should be timely to the hospital, to clarify the cause, under the guidance of the doctor according to the cause of the treatment.