Men can not get hard for more reasons, need to pay attention to: 1, men often masturbate will lead to penis insensitive, over time will lead to hard, develop good sex habits, do not often masturbate. 2, often stay up late on the kidney burden, easy to cause kidney deficiency, there will be unable to erect, premature ejaculation. 3, the first time sex without experience in sex, because of nervousness can not be very hard. If men have too much sex can also lead to hard up, their own diseases, such as impotence, premature ejaculation, the symptoms of the inability to erect need to go to the hospital for medical attention, men can not get hard up in many cases, must pay attention to the problem, physical discomfort should go to the hospital for examination, early treatment, to help early recovery.