Cassia seed tea has a relieving effect on headache and dizziness, redness and swelling of the eyes, photophobia and excessive tearing, darkness and uncertainty of the eyes, and intestinal dryness and constipation. Cassia seed tea is a tea made from the Chinese medicine cassia seed. Cassia seeds taste salty, bitter, sweet, flat, slightly cold, attributed to the liver, large intestine meridian, has the effect of clearing the liver and brightening the eyes, lubricating the bowels and laxative effect, can be used to treat headache and dizziness, eye redness and swelling pain, fear of light and excessive tearing, eye darkness and uncertainty, intestinal dryness constipation and other symptoms. Adverse effects of cassia seeds is not clear, but qi deficiency loose stools (feces thin and not shaped) should be used with caution. Cassia seeds in water is difficult to achieve the purpose of treatment of disease, such as the need to treat diseases, it is recommended to consult a professional Chinese medicine practitioner and under the guidance of the Chinese medicine practitioner to use correctly, do not blindly use their own medication, so as to avoid delays in the condition, or to the body to cause adverse effects.