Impotence may be due to yang deficiency or yin deficiency, because both yang and yin deficiencies are prone to induce kidney deficiency, which cannot be analyzed based on one symptom alone, but also needs to be combined with other symptoms to make a judgment. 1. Yang deficiency: If impotence is caused by Yang deficiency, there will also be fear of cold, cold hands and feet, pale face, thin stools, pale tongue and white moss, weakness and shortness of breath and other symptoms, mainly cold. 2. Yin deficiency: If impotence is caused by yin deficiency, there will also be flushed cheeks, hot heart (two hearts and two hearts of the feet are hot, and consciously hot heart and chest), hot flashes (a burst of heat), night sweats (abnormal sweating after going to sleep, and waking up sweating stops), insomnia, dreamy, dry mouth and throat and other symptoms. The main focus is on heat. If you feel unwell, it is recommended that you consult a hospital in time and be treated under the guidance of a professional physician to avoid delays in your condition.