Modern pharmacological studies have found that psyllium has a certain effect of reducing the concentration of urinary oxalic acid and the risk of urinary stone formation. Psyllium is the dried mature seeds of Plantago ovata or Plantago ovata, family Psyllaceae. It has the effect of clearing heat and diuresis, stopping diarrhea by seepage of dampness, brightening the eyes, and expectorating phlegm. It can be used to treat dysuria (unsmooth urination), leucorrhea (cloudy urine and leukorrhea), edema and distension, summer-dampness and diarrhea, redness and opacity of the eyes, and phlegm-heat and asthma. Modern pharmacological research found that psyllium extract 0.6g raw drug / only to rats by gavage for 13d, the experimental results show that psyllium has a certain role in reducing the concentration of urinary oxalic acid and the risk of urinary stone formation, the renal calcium content of a significant decrease, indicating that it has a strong inhibition of renal calcium oxalate crystal deposition. Adverse reactions are mainly allergic reactions, which can be seen as scattered large erythematous spots on the skin of the limbs, back of the shoulders, top of the head, behind the ears, eyelids and other parts of the skin, with clear boundaries, obviously bulging out of the skin surface, bright red in color, with a darker central coloring and nodular protrusion, accompanied by itching, pain, fever, heartburn, and a dry and bitter mouth. The above symptoms disappeared after stopping the medicine. If toxic manifestations occur, the medicine should be stopped immediately. It is recommended to take psyllium under the guidance of a doctor to avoid to avoid adverse reaction or delay the condition.