Rehmannia glutinosa is effective in clearing heat and fire (removing heat and fire from the body), generating fluids to quench thirst (promoting the production of fluids to quench thirst), removing vexation, relieving vomiting, and inducing diuresis. It is used in the treatment of fever and thirst (irritable thirst due to heat), lung-heat cough, stomach-heat vomiting, and feverish drenching (burning and stinging pain evident during urination, accompanied by frequent urination and urgency, and discomfort of pulling in the lower abdomen).
Rehmannia glutinosa is sweet, cold, and belongs to the lung and stomach meridians. It should be used with caution for those with deficiency and coldness of the spleen and stomach (spleen and stomach weak and cold), and the adverse effects are not yet clear.
If you need to apply, it is recommended to consult a professional doctor, do not self-medicate.