Xia Ku Cao can treat thyroid nodules, especially it has a certain effect on cold nodules and can control their growth. As a traditional Chinese medicine, Xia Ku Cao can clear liver fire, disperse nodules and subdue swelling, clear heat and detoxify, dispel phlegm and stop cough, cool blood and stop bleeding, etc. It can be used clinically to treat lymphatic tuberculosis, goiter, breast disease, and has certain auxiliary therapeutic effects on dizziness, distortion of the mouth and eyes, pain in the periphery, tuberculosis, female leakage of blood, dysbiosis, acute infectious hepatitis, etc. Xia Ku Cao is best combined with related symptoms under TCM discernment and applied with other drugs and Xia Ku Cao to regulate the internal environment of human body, which can control thyroid nodules from the root. Thyroid nodules can be divided into cold nodules and hot nodules. Hot nodules can be transformed into thyroid cancer, and hot nodules can also be treated with Xia Ku Cao for reasonable symptomatic treatment.