Diffuse thyroid lesions are a description of thyroid ultrasound and are usually asymptomatic in the absence of hyperthyroidism or hypothyroidism. Diffuse thyroid lesion is a description of thyroid ultrasound, which refers to diffuse inflammatory changes in the thyroid gland, not simply a disease, can be seen in Hashimoto’s thyroiditis, Graves’ disease, postpartum thyroiditis, etc., and may be accompanied by a goiter, which needs to be combined with the examination of the thyroid function, thyroid-related antibodies, iodine uptake rate and other tests for a further definitive diagnosis. If there is no hyperthyroidism or hypothyroidism, there are usually no symptoms. If Graves’ disease is diagnosed, there may be symptoms such as fear of heat, excessive sweating, palpitations, etc. If Hashimoto’s thyroiditis is diagnosed, there may be symptoms related to hypothyroidism, such as fear of cold, fatigue and other symptoms. Patients with diffuse thyroid lesions should go to the hospital to clarify the cause and treatment under the guidance of a doctor.