Before do not need sexual stimulation can erect, now need sexual stimulation to erect, this is usually not a big problem, most of the psychological factors, as long as you can erection shows that there is no organic lesions. If you have recently been physically tired, often stay up late, life, work, economic pressure is relatively large, husband and wife relationship is not coordinated wind these psychological factors can appear this situation. The maintenance of erection needs to have continuous sexual stimulation, as long as in the sexual stimulation can be normal erection, maintain enough hardness for sexual life is not a problem. If the erection hardness is poor in the last three months, can not maintain enough hardness to complete sexual life, consider the existence of erectile dysfunction, you can go to the hospital to carry out relevant examinations, to exclude organic lesions, and then choose the appropriate treatment program.