Cassia seeds are sweet, bitter, salty, slightly cold, attributed to the liver, large intestine meridian, with clearing heat and brightening the eyes (to get rid of the body’s heat evil, to promote the recovery of vision), laxative effect, used for the treatment of eye redness and astringent pain, shyness and tearfulness (the eyes are afraid of the light, and often tears), dark and unclear eyes, headache, dizziness, constipation and other diseases. Soak cassia seeds in boiling water for 3~5 minutes to drink. However, it should be noted that people with cold spleen and stomach (spleen and stomach weakness and cold) and loose stools (thin and unformed feces) should be cautious. In addition, using cassia seeds with wolfberry, chrysanthemum, celosia, etc., has the effect of clearing the liver and diarrhea (clearing liver fire), nourishing the yin and brightening the eyes, and is suitable for the eye redness, swelling and pain, blurred vision and other conditions. It is recommended that patients who are not feeling well should first go to a regular Chinese medicine hospital for treatment by a professional physician, and should not take it blindly on their own.