Psyllium has certain efficacy in removing dampness and can be used in diseases of dampness and heat, but not in diseases of cold and dampness. Psyllium belongs to a kind of sweet and cold nature of the Chinese medicine, with heat diuretic diuresis and gonorrhea (to improve the urine dribbling, urine volume of the problem), expectorant, detoxification, cooling blood effect. It is used for summer-dampness diarrhea (diarrhea caused by feeling summer-dampness in summer), edema with low urine output, heat drenching (burning and stinging pain evident during urination, accompanied by frequent urination and urgency, and discomfort of pulling in the abdomen) with astringent pain, phlegm-heat cough, carbuncle, swelling, sores, and vomiting of blood with epistaxis (nosebleed). Psyllium can be used to clear heat and dispel dampness by clearing heat and inducing diuresis, and can be used in diseases of dampness and heat (such as sticky mouth, sticky and unpleasant stools, and yellowish and greasy tongue, etc.). However, it is not effective in dispelling dampness for those with cold dampness (heavy and sleepy body, white and greasy tongue, etc.). The adverse effects or contraindications of Plantago Ovata are not clear. Dampness should be eliminated under the guidance of a doctor’s evidence-based guidance, do not use unauthorized use of traditional Chinese medicine treatment, so as not to aggravate the condition.