Soaked cassia seeds can be eaten, but due to the active ingredients are less as well as taste and other reasons, it is generally not recommended to eat, should follow the doctor’s instructions for medication. Cassia seeds are used to decoct soup for internal use, or powder, or make tea to drink. Externally, it can be powdered and applied to the affected area. Therefore, the cassia seeds in water can be eaten. Cassia seeds taste sweet, bitter, salty, slightly cold. Attributed to the liver meridian, large intestine meridian. It has the efficacy of moistening the bowels, clearing heat and brightening the eyes (removing heat from the body and promoting the recovery of eyesight). It is used for shyness and tearfulness (the eyes are afraid of light and often shed tears), redness and astringency of the eyes, darkness and uncertainty of the eyes, headache and dizziness, constipation and so on. Cassia seeds are often used with Scutellaria baicalensis and Paeonia lactiflora to treat red eyes and swelling pain; Chrysanthemum and Celosia argentea to treat wind-heat headache and red eyes; Cornus officinalis and Radix et Rhizoma Dioscoreae to treat darkness and uncertainty of the eyes. People with cold spleen and stomach (spleen and stomach weakness and cold) or loose stools (thin and unformed stools) should be cautious of taking cassia seed, and the adverse effects of cassia seed are not clear. Patients are advised to consult a doctor if they feel unwell, and should use the medicine under the guidance of a doctor.