Dandelion is effective in detoxifying and clearing heat, reducing swelling and dissipating lumps, and inducing diuresis to clear dampness. Its main function is to treat diseases caused by dampness-heat and heat-poison internal obstruction. Dandelion is the dried herb of dandelion, family Asteraceae, used in medicine. It is cold in nature, sweet and bitter in taste, and belongs to the liver and stomach meridians. Its main effects are detoxifying and clearing away heat, dispersing lumps and swelling, inducing diuresis and clearing away gonorrhea. It is mainly used for the treatment of furuncles (mostly occurring on the limbs or face, small in shape with deep roots, as hard as nails), intestinal carbuncles (carbuncles occurring in the intestines and bowels, manifested by fever, pain in the right abdomen, and palpable lumps), mammary carbuncles, scrofula (mainly refers to lymph node nodule tuberculosis of the neck), eye redness and pain, sore throat, lung carbuncles, and jaundice with dampness-heat, etc. The adverse effects of dandelion are not yet known. The adverse reactions of dandelion have not been precisely documented. It is contraindicated for those with yang deficiency and external cold, and those with weak spleen and stomach, because of its bitter and cold nature, and long-term use of dandelion is not recommended for those with spleen and stomach deficiency (spleen and stomach weakness and cold). If you need to use dandelion, it is recommended that you choose to use it after a professional Chinese medicine practitioner has clearly identified the cause of the disease, and you should not purchase the medicine blindly, so as not to affect the efficacy of the treatment.