Rhubarb powder is a powder made from the Chinese medicine rhubarb, and the effects of rhubarb powder in water are diarrhea, expelling blood stasis and clearing the menstruation (removing blood stasis and clearing the menstruation). Rhubarb has the effect of diarrhea, clearing away heat and fire, expelling blood stasis and clearing up menstruation. It is used in the treatment of constipation due to stagnation of damp-heat, epistaxis due to blood-heat (vomiting blood and nosebleed caused by blood-heat), eye redness and throat swelling, carbuncle (carbuncle occurring in the intestines and bowels and manifested by fever, pain in the right abdomen, and palpable lump), abdominal pain, menstrual occlusion due to stasis of blood and blood, bruise, dysentery due to damp-heat, etc. It is also used as a treatment for the treatment of diarrhea and dysentery due to damp-heat. It should be noted that rhubarb is a very strong and aggressive product, so it should not be used without solid evidence. It should not be used indiscriminately if not in actual condition. It should also be used with caution if the spleen and stomach are weak. It should be avoided during pregnancy, menstruation and lactation. If you need to use rhubarb powder in water, you must use it under the guidance of a professional doctor.