Cistanche belongs to traditional Chinese medicine, which is warm in nature and sweet in taste. It is generally not suitable for people with high phase fire, loose stools and solid heat. 1. Excessive fire: Cistanchis is mild in nature and belongs to the kidney meridian and the large intestine meridian, which can tonify kidney yang, qi and blood, etc. Cistanchis is not suitable for people with excessive fire. However, Cistanchis are not suitable for people with high phase fire, which may be accompanied by symptoms such as blurred vision, irritability, and heart-heat (heat in the heart of the hands and feet, and a feeling of heart-heat in the chest). 2. Loose stools: Cistanchis is used in the treatment of intestinal dryness and constipation, while patients with loose stools do not have intestinal dryness and constipation, consuming Cistanchis may aggravate diarrhea. In addition, loose stool is also one of the people who are forbidden to take Cistanchis. 3. Solid heat: As Cistanchis are warm tonic and kidney tonic herbs, patients with recent or long-term symptoms of fire such as dry stools and mouth ulcers should not take Cistanchis. Patients are advised to judge whether they can consume Cistanchis according to the advice of professional doctors and their personal constitution to avoid aggravating their condition.