Whenever you drink the herbal medicine for tonifying the kidney, you will get diarrhea, which is considered to be caused by the wrong medication, the stimulation of the medication, and the condition of not being able to take the tonic. 1. Wrong medication: There are two types of herbal medicines for tonifying the kidneys, those for tonifying the kidney yang and those for tonifying the kidney yin. If a patient makes a mistake in medication, it will be counterproductive and aggravate the condition, resulting in gastrointestinal disorders, diarrhea and other symptoms. 2. Drug stimulation: Most of the drugs for tonifying the kidney, especially those for tonifying kidney yin, such as Radix Rehmanniae Praeparata, are quite nourishing and not easy to digest. If you take the medicine after a full meal, or take too much at once, it will increase the burden on the stomach and intestines, stimulate the stomach and intestines, indigestion and even diarrhea. 3. The deficiency is not subject to tonic: if the patient himself is weak, poor gastrointestinal function, then also go to take kidney tonic drugs, the stomach and intestines can not digest the operation of these drugs, there will be the deficiency is not subject to tonic, abdominal pain, diarrhea. When symptoms occur, you should consult a doctor for evidence-based treatment, do not self-medicate, so as to avoid improper use of medication to cause damage to the organism.