What is the reason why the penis cannot be erected normally?

1, psychological factors

due to the patient's anxiety, depression, psychological trauma, psychological stress and other psychological problems, easy to cause hormone levels in the body disorder, interfere with the nerve response of the penis, can not maintain the normal erection of the penis.

2, nerve factors due to the

patient suffering from Parkinson's disease, spinal cord disease, stroke and other diseases, will make local nerve lesions, leading to erectile dysfunction.

3, vascular factors due to the

existence of arterial stenosis, arterial damage and other conditions, can not maintain blood circulation in the penis, easy to cause partial tissue necrosis, causing erectile dysfunction.