Cassia seed tea taken with rock sugar can clear the liver and improve eyesight (remove liver fire to promote vision recovery), laxative. Cassia seed is cold in nature, it can clear the liver and improve eyesight, moisten the intestines and laxative. It is used for eye redness and swelling pain caused by wind-heat upward to the head and face, blurred vision caused by yin deficiency of the liver and kidney, dark and unclear eyesight, headache and vertigo due to hyperactivity of the liver and yang (liver yang is overactive, which causes dizziness, dizziness, headache, etc.), as well as constipation due to internal heat and dryness of the intestines. Adding cold rock sugar can correct the flavor and also help cassia seeds clear heat and fire (remove heat and fire from the body). Cassia seed tea with rock sugar, not only can clear the liver and eyesight, laxative, for the liver fire caused by inflammation of the headache, dizziness, eye swelling and pain and intestinal dryness and constipation also has a certain effect. Because cassia seeds have laxative effect, it is not suitable for those who have loose stools. It is recommended to consult a traditional Chinese medicine practitioner before taking it, and to take it only after a traditional Chinese medicine practitioner has identified the symptoms, and not to take it blindly on your own, so as not to affect your health.