Cassia seeds are the dried seeds of the leguminous plant cassia, which have the effect of clearing heat and brightening eyes, laxative and laxative, so they are often used clinically to treat the following diseases: 1, used for swelling and pain of red eyes with liver heat. It is used to treat headache and dizziness caused by hyperactivity of liver yang, and is often used in combination with chrysanthemum and hooked vine. 3, cassia seeds are bitter-cold and enter the large intestine meridian, so they can clear heat and open the bowels, and are used to treat intestinal dryness and internal heat, constipation and dryness.