Toadstool is an alias of Plantago Ovata, which has the effects of clearing away heat to relieve gonorrhea, seeping away dampness to stop diarrhea (removing dampness to treat diarrhea), and is often used in diseases such as heat gonorrhea (burning and stinging pain is obvious when urinating, accompanied by frequent urination and urgency, and discomfort from traction in the lower abdomen), and edema. The Chinese medicine Plantago Ovata is the whole grass of Plantago ovata, which is slightly cold in nature and sweet in taste. It belongs to the liver, kidney, lung and small intestine meridians. Its effects are brightening the eyes, expelling phlegm, detoxifying and cooling the blood. Clinically, it can be used for the treatment of feverish drenching and astringent pain, summer dampness diarrhea (diarrhea caused by summer dampness), phlegm-heat cough, edema and urination, as well as blood heat and vomiting of blood, sores, carbuncles and swollen poisons. Adverse reactions are not clear and contraindications are not clear. If necessary, please go to the hospital for standardized consultation and use the medicine under the guidance of the doctor.