Dandelion belongs to the whole herb for medicine, the root and the leaves have the same efficacy, there is no “dandelion root and leaf efficacy which effect is better”. Dandelion is collected from the roots before flowering, washed and used fresh or dried. The leaves of dandelion are lighter, so the active ingredients can be decocted more easily, while the root is thicker and takes longer to decoct the active ingredients, but the efficacy of both is the same, and there is not much difference in the active ingredients. Dandelion is cold in nature and bitter in taste. It has the effects of clearing away heat and detoxification (removing heat and toxicity from the body), subduing swellings and dispersing knots, and inducing diuresis and diaphoresis (improving the problem of dribbling in urine and the problem of small and incomprehensible amount of urine). It is often used in the treatment of furuncles (sores occurring on the limbs or face, small in shape with deep roots and hard as nails), breast carbuncles, scrofula (mainly refers to tuberculosis of lymph nodes in the neck), redness of the eyes, sore throat, lung carbuncles, intestinal carbuncles (carbuncles occurring in the internal organs of the intestines and manifested by fever, pain in the right side of the abdomen, and palpable lump), and damp-heat jaundice, etc. It is also useful in the treatment of cold and dampness of the spleen and stomach (deficiency of heat and cold in the spleen and stomach). Dandelion should be used with caution by those who have a weak and cold spleen and stomach (spleen and stomach are weak and cold).