Improper use of senna can have adverse reactions leading to nausea, vomiting, abdominal pain, etc. It should be used properly under the guidance of a physician. Moreover, the effect of drinking Chinese herbal medicine in water is not as good as that of decoction, so it is not recommended to take it in water. Senna is bitter in taste and cold in nature, with the effects of laxative and laxative, diuresis and elimination of flatulence (elimination of swelling by way of diuresis). It is used to treat constipation with heat knot, which may be accompanied by sore throat, dry stools, yellow urine, etc. It is also used to treat abdominal fluid and swelling. It acts as a slow diarrhea in small doses and attacks the lower part of the body in larger doses. Women should be cautious during lactation, menstruation and pregnancy. Patients are advised not to use the medicine without authorization as it may cause side effects. If necessary, please go to the Department of Traditional Chinese Medicine to have the appropriate prescription prescribed by a physician after identification.