Senna can be taken in boiled water. The dosage is 2 to 6 g. However, note that the effective dose of herbal infusion is limited, the therapeutic effect is limited, if you want to achieve the therapeutic effect is recommended under the guidance of a doctor for regular treatment. Senna is sweet, bitter, cold, belonging to the large intestine meridian, belongs to a kind of Chinese medicine. Usually, patients need to use 2 to 6g of senna in water under the guidance of the doctor to take, generally recommended the use of boiling water, but can also be decocted, can play a diarrhea heat laxative, diuretic, digestion and other effects, can be used to treat abdominal fluid and swelling, heat constipation (heat and evil concentration and constipation), food stagnation and other conditions. In addition, not all people can take senna, common contraindications are lactation, menstruation and pregnancy. In short, patients must strictly follow the doctor’s instructions to use medication, do not use senna in water on their own.