Radix Rehmanniae Praeparata (地黄饮子) is used for treating mute rash of kidney deficiency, which is characterized by a strong tongue, inactivity, inability to speak normally, weakness of the lower limbs, inability to stand up and walk, dry mouth with no desire to drink, and cold feet with a flushed face. Dihuang Drink is a tonic. In this formula, cooked and dried Dihuang cools Blood and nourishes Yin (removing heat from Blood and nourishing Yin and fluid); Cistanchis and Morinda citrifolia tonify the Kidneys and help Yang; Cornus officinalis tonifies the Liver and Kidneys; Dendrobium nourishes Yin and clears heat; Radix et Rhizoma Dendrobium and Radix guiarana tonify the Fire and help Yang; Schisandra tonifies the Kidneys and nourishes the Heart; Poria cocos strengthens the Spleen and exudes Dampness; Maitake Maitake moistens Yin and moisten the Lungs; Calamus calamus expels Phlegm to open the Orifices (clearing the orifices by removing Phlegm and waking up the Mind); and Polygonum longifolium calyculus nourishes the Heart and tranquilizes the Mind. Together, these herbs have the effect of nourishing kidney yin, tonifying kidney yang, opening the orifices and resolving phlegm. Di Huang Drink is a representative formula for treating Kidney deficiency with rash. This formula is contraindicated in patients with rash and hyperactivity of liver yang (hyperactivity of liver yang, causing dizziness, dizziness, headache, etc.), such as dizziness and swelling of the head, irritability, insomnia and excessive sleepiness, etc. If there is any discomfort, please consult a doctor promptly. If there is any discomfort, please consult a doctor in time, do not use medicine without authorization to avoid causing adverse reactions.