Thick neck in Hashimoto’s thyroiditis may gradually return. Hashimoto’s thyroiditis is a type of autoimmune thyroiditis in which autoantibodies attack the thyroid tissue, leading to diffuse changes in the thyroid tissue, resulting in hypothyroidism, producing hyperplasia of the thyroid tissue, enlargement of the thyroid gland, and causing a thick neck. Gradual recovery is possible with aggressive treatment. For patients with hypothyroidism in Hashimoto’s thyroiditis, lifelong treatment with levothyroxine sodium tablets is needed, and this drug both replaces treatment and reduces goiter. There is also the usual diet should be light, avoid staying up late and overwork, control the condition. Hashimoto’s thyroiditis patients should go to the hospital in time, under the guidance of the doctor’s treatment.