Senna and rhubarb are cold in nature and may cause abdominal pain, gastric discomfort and other symptoms if taken for a long time or if the medication is not suitable for the patient, so the specific medication and treatment should be prescribed by a medical professional. In addition, the medication can play a limited role in the medicinal effects of water, it is recommended that the professional physician to guide the use of medication. 1. Senna taste sweet, bitter, cold, to the large intestine meridian, with diarrhea heat stagnation, facilitate the efficacy of water, used to treat heat stagnation, constipation and abdominal pain, edema and fullness of the disease. Nursing, menstruating women and pregnant women should be cautious of using this product. 2. Rhubarb is bitter in taste, cold in nature, and belongs to the spleen, stomach, large intestine, liver and pericardium meridians. Its effects are to diarrhea and attack the accumulation of stagnation (treating constipation by clearing stools), clearing heat and fire, cooling the blood and detoxifying the toxin, expelling blood stasis and clearing the meridians, promoting the use of dampness to relieve jaundice (expelling dampness to relieve the jaundice). Rhubarb is used in the treatment of constipation, sore throat, carbuncle, carbuncle (carbuncle that occurs in the intestines and bowels, manifested by fever, pain in the right abdomen and palpable lumps), abdominal pain, menstrual occlusion due to stasis of blood, bruises, dysentery due to dampness-heat, jaundice, etc. It is also used to relieve blood stasis, remove blood stasis and clear the channels. Be cautious of using rhubarb if the spleen and stomach are weak; be cautious of using it during pregnancy, menstruation and lactation. When discomfort occurs, it is necessary to consult a doctor and choose medication under the guidance of physician’s diagnosis, and not to use medication on one’s own in order to avoid delaying the condition.