In general, wanting to have intercourse but not being able to hold it up generally refers to erectile dysfunction, which may be caused by organic lesions, psychological factors, mixed factors and other reasons. 1. Organic lesions: normal vascular function is the basis of physiological penile erection, such as arteriosclerosis, venous fistulae, etc. can affect the vascular function of the penis, resulting in the emergence of this disease. It may also be caused by central nervous system diseases, spinal cord injury, peripheral nerve injury or lesions, etc., due to abnormalities in the nerves, which leads to the disease. 2. Psychological factors: psychological stress is closely related to erectile dysfunction, such as daily disharmony between husband and wife, asymmetry or lack of sexual knowledge, adverse sexual experiences, work or economic pressure. All of them can affect the erectile function of the penis, thus this disease appears. 3. Mixed factors: common such as diabetes, hypertension, surgical injury and other primary diseases, as well as drugs, lifestyle, social and environmental factors. Various diseases and causative factors lead to the development of erectile dysfunction through their different or common pathways. In addition, erectile dysfunction can also be seen in other diseases, it is recommended that patients go to the hospital in time to avoid delay.