Doing it and then soft, may be a manifestation of erectile dysfunction, the main consideration with psychological factors, mental factors, organic factors and other factors and so on. 1. Psychological factors: Discord with the sexual partner, lack of sexual skills, economic pressure, etc., may lead to erectile dysfunction. 2. Psychological factors: such as depression, anxiety disorders and other mental illnesses, patients often have some physical symptoms, such as erectile dysfunction, premature ejaculation and so on. 3. Organic factors: such as pituitary tumors, diabetes, prostatitis and other organic lesions, can also trigger erectile dysfunction. 4. Other factors: such as the application of reserpine, benadryl and other drugs, can lead to erectile dysfunction and other adverse reactions in some patients. If the phenomenon of doing it and then soft, its cause is complex, it is recommended to consult a doctor in a timely manner.