Psyllium is mainly used in decoction for internal use, but can also be used in pills and powder for oral use. Psyllium is the dried mature seeds of Plantago ovata or Plantago ovata, family Psyllaceae. It is sweet in flavor and cold in nature. Attributed to the liver, kidney, lung, small intestine meridian. It has the effects of clearing heat, diuretic and diaphoretic (improving the problem of dribbling in urine, and the problem of small amount of urine not being able to pass), exuding dampness and stopping diarrhea (removing dampness to treat diarrhea), brightening the eyes, and expectorating phlegm. Psyllium can be used for heat drenching (burning and stinging pain when urinating, with frequent urination and urgency, discomfort in the abdomen), astringent pain, edema and distension, summer dampness and diarrhea (diarrhea caused by summer dampness in the summer), redness and swelling of the eyes, phlegm-heat cough. Psyllium is cold in nature, so it is forbidden for those who have sunken yang qi, spermatorrhea and no internal dampness or heat. If you feel unwell, it is recommended that you go to the hospital as soon as possible, do not self-medicate, so as not to delay the condition.