Plantain mainly has the effects of clearing heat and diuretic, cooling blood and detoxifying. Psyllium is a kind of Chinese herb with sweet flavor and cold nature; it belongs to the meridians of liver, kidney, lung and small intestine. It has the efficacy of clearing heat, diuretic and diaphoretic (to improve the problem of dribbling in urine, small amount of urine and inability to pass), expelling phlegm, cooling the blood, and detoxifying the toxin. Clinically, this drug is often used in the treatment of feverish drenching (burning and stinging pain during urination, accompanied by frequent urination and urgency, and discomfort of traction in the abdomen), astringent pain, edema and low urine output, summer dampness and diarrhea (diarrhea caused by summer dampness in summer), phlegm-heat cough, vomiting and epistaxis, carbuncle, swelling, sores and poisons and other diseases. The adverse reactions and contraindications of Plantago Ovata are not clear. The general usage is to take Plantago Ovata for decoction or pounding juice, and can also take appropriate amount for external use. If you need to use this drug, it should be used under the guidance of traditional Chinese medicine practitioners, and patients should not use it without authorization.