Hashimoto’s thyroiditis, or chronic thyroiditis, is a non-infectious autoimmune disease of unknown etiology, with genetic and autoimmune factors interacting to develop the disease, which occurs in more than 90% of women. There is no effective treatment for this disease in Western medicine. Patients who progress to the hypothyroid stage need to take oral replacement therapy with eugenol. Modern Chinese medicine believes that Hashimoto’s disease is characterized by a mixture of deficiency and reality, the root of the disease is the internal deficiency of positive energy, and the external gall, combined with the Western medicine immunology point of view, so it is a difficult to treat the disease. The treatment can be based on the patient’s specific condition, taking both primary and secondary treatment methods, such as tonifying the vital energy, relieving the liver and depression, activating blood circulation, resolving phlegm, eliminating galls and dissipating nodules to improve the immune system, relieving discomfort and eliminating the enlarged thyroid gland, in addition to topical application of ointment to the thyroid gland to improve the therapeutic effect. A significant proportion of patients with Hashimoto’s thyroiditis require lifelong replacement therapy with Eugenol because the thyroid gland is severely damaged by inflammation, leading to hypothyroidism!