It is not true that the soil rhubarb boiled water to wash the head to become black hair. The taste of bitter, pungent, cool, efficacy is to clear the heat and detoxification (remove the body heat and poisonous evil), cool blood to stop bleeding (so that the blood cool and moist, to prevent bleeding), remove the stasis of swelling, laxative, insecticide, the earth rhubarb can be used to treat the consumption of coughing blood, lung pain, vomiting, stagnation of abdominal pain, bruises, constipation, mumps, carbuncles, burns, scabies, eczema, and so on. From the efficacy and role of rhubarb, rhubarb boiling water to wash hair black hair is not true. The adverse reactions and precautions of earth rhubarb are still uncertain; use with caution for people with cold spleen and stomach (spleen and stomach weak and cold). If you need to use the Chinese medicine Tu Da Huang, should be used by a professional Chinese medicine practitioner under the guidance of the evidence, do not buy and use, in order to avoid delays in the condition.