When sex just started to be hard, and when you want to penetrate the penis will be soft, considered as penile erectile dysfunction, can be divided into psychological and organic. Erectile dysfunction, for the penis erection hardness is not enough to insert into the vagina or maintain the time is not enough, difficult to complete sexual intercourse, in some psycho-psychological factors such as depression, schizophrenia, bad sexual life experience and so on, can lead to the occurrence of erectile dysfunction. Some organic diseases such as trauma, lower abdominal or perineal surgery can damage the penile blood vessels and nerves, so that erectile dysfunction; physical diseases such as diabetes, cardiovascular disease, as well as smoking, obesity, insomnia and so on can also cause erectile dysfunction, can not achieve full penile erection. It is recommended that people with erectile dysfunction should go to the hospital specialist in time to clarify the cause of the disease and treat the symptoms.