Half lotus and White Flower Snake Tongue Herb are both heat-clearing and detoxifying medicines, which are cold in nature, easy to hurt the stomach, and should not be taken for a long time. Half lotus is the dried grass of the plant of the family Labiatae, which is pungent, bitter, cold in nature, and belongs to the lung, liver and kidney meridians, with the effect of clearing heat and removing toxins, stopping bleeding and reducing swelling. It is mainly used for boils, sore throat, bruises and oedema. It is contraindicated for weak and pregnant women to take with caution, adverse reactions are not clear. White-flowered Snake Tongue Grass is the dried whole grass of the plant of the Rubiaceae family, its flavor is slightly bitter, sweet, cold, belonging to the stomach, small intestine, large intestine meridian, has the effect of clearing away heat and removing toxins, diuresis, diuresis, and so on. It is mainly used for carbuncle sores, sore throat, poisonous snake bites, hot lymph (burning stinging pain during urination, accompanied by urinary frequency and urgency, abdominal traction discomfort) astringent pain, damp-heat jaundice and so on. The contraindications of Huperzia serrata are yin gangrene (a general term for a class of slow-acting negative sores and ulcers) and caution for those with cold spleen and stomach, and the adverse effects are not clear for the time being. Both drugs can clear heat and detoxify toxins, but the cold nature of the drug is easy to hurt the spleen and stomach, and should not be taken for a long time or more. If medication is needed, it should be guided by a professional Chinese medicine practitioner after diagnosis, and should not be taken blindly by oneself.