There is no specific time for taking Xia Gu Cao for thyroid nodules, generally two to three weeks to see the improvement of symptoms, need to be taken according to the doctor’s instructions. Thyroid nodule belongs to the name of western medicine, the main symptom for the neck in front of the throat knot on both sides of the lump swelling, belongs to the Chinese medicine “gall disease” category. The main reasons for the onset of the disease are: emotional and internal injuries, so that the liver’s regulation of emotional and qi dysfunction, qi stagnation, the body’s water and fluid distribution is blocked, coagulation into phlegm, blockage of condensation in front of the neck; diet or soil and water inappropriate, affecting the function of the spleen and stomach, so that the spleen water and fluid dysfunction, gathering dampness and phlegm. This disease is mainly treated by regulating qi and resolving phlegm (regulating the body’s qi mechanism to resolve phlegm), eliminating swelling and dispersing lumps. Xia Gu Cao is a heat-clearing and fire-dissolving (removing heat and fire from the body) medicine, and its effects include subduing swelling and relieving pain (eliminating swelling and pain), diarrhea and removing vexation, clearing heat and inducing diuresis (removing heat and dampness in the body), and cooling blood to remove toxins (referring to treatment of heat and toxins in the blood). It is mainly used for treating swelling and pain in the eyes, dizziness, redness, swelling and pain in the breasts, as well as swelling and lumps in the front of the neck, i.e. “gall disease”. This medicine should be used with caution for those with weak spleen and stomach. Xia Gu Cao is effective in treating thyroid nodules, but please consult a medical professional for specific disease treatment and drug use.