It is best not to drink cassia seeds during menstruation because they belong to Chinese medicine and have the effect of activating blood stasis and clearing the liver. It is recommended to avoid drinking cassia seeds during menstruation because of the loss of blood, women are prone to hypotension, dizziness and other discomfort, taking cassia seeds will lead to a further drop in blood pressure, which may aggravate the discomfort during menstruation. The maintenance of normal menstruation is mainly affected by the level of hormones in the body, and attention needs to be paid to avoid taking drugs as much as possible to avoid the occurrence of menstrual disorders.