The disorders of the erektsionnoy function can arise for very many reasons and fairly often these developed disturbances are only symptom of another illness. As a whole, as a rule, the reasons, which influence the development of the disorders of erections, they can be divided into five groups:

Psychological disorders:

depression
addiction
alcoholism
specific psychopathological disorders - "fear of sexual weakness", the poor sexual technology so forth the endocrine disorders: hypo-gonadism (underdevelopment of sexual glands), diabetes mellitus, obesity, prolaktinoma (tumor of the brain).

Disorders of the vascular system:

the atherosclerotic defeat of the arterial system of sexual term against the background of diabetes mellitus, smoking, increased cholesterol of the blood, hypertonic disease, occlusion (i.e. thrombosis) of the arteries of small basin (as a rule, they appear after the fracture of the bones of basin), disorder of venous system.

Organic changes in the sexual term:

the disease Of peyroni (bend of sexual term), of injury, injury, the transferred inflammations and so forth the neurologic disorders: the disturbance of cerebral blood circulation (strokes), disease of spinal cord, multiple sclerosis, Parkinson's disease.

Thus - in 60% of cases the reason for impotence is the fact that the blood does not enter penis or appears its rapid ebb back. In 15% of cases the reason should be searched for in the concealed disorders of nervous system. 5% of cases are developed against the background of different endocrine (hormonal) diseases. And only 20% are caused by psychological motives..