Cassia seed can be used as an herbal medicine, and its harmful effects on the human body have not been clarified. However, cassia seeds may cause abdominal pain, diarrhea and other uncomfortable symptoms if used in large quantities for a long period of time or in a single session. Cassia seed is a legume obtuse leaf cassia or cassia dry mature seeds made of sun-dried, sweet, bitter, salty, slightly cold, with clear heat and bright eyes (to remove the body heat evil, to promote vision recovery), laxative effect. Cassia seeds can be used for the treatment of eye redness and astringency, shyness and tearfulness (eyes afraid of light, often tears), headache and dizziness, darkness and uncertainty of the eyes, constipation and constipation of the bowels of the disease. Adverse effects and contraindications of Cassia seed are not clear. It should not be used by people with Qi deficiency and loose stools (thin and unformed feces), otherwise gastrointestinal discomfort such as abdominal pain and diarrhea may occur. Although there is no clear cassia seeds take on the human body will have any harm, but the use of drugs or under the guidance of a doctor, not to change the amount of drugs, drugs, as well as the time to take. If you take the body after the discomfort to go to the hospital in time for treatment.