Men who can’t get hard belong to erectile dysfunction. At present, it is mainly believed that it is related to psycho-psychological factors, organic factors, mixed factors and so on. 1. Spiritual psychological factors: long-term husband and wife relationship is not harmonious, economic pressure is relatively large, bad sexual experience, and anxiety, schizophrenia and other mental illnesses, can lead to men with erectile dysfunction. 2. Organic factors: such as prostatitis, penile trauma, arteriosclerosis, pituitary tumors, diabetes, hypertension and other diseases, can also lead to erectile dysfunction. 3. Mixed Erectile Dysfunction: refers to erectile dysfunction caused by a combination of psychosomatic factors and organic causes. Erectile dysfunction in men may also be related to other factors. It is recommended that the patient should consult a doctor for timely examination and early treatment.