An erection occurs by the blood entering into the many spaces inside the penis, it may be understood as a hydraulic action. The blood which enters various spaces inside the penis will retain inside the penis to maintain the erection.
This process will occur as a result of sexual arousal in which first the signals will be transmitted from the brain to the nerves in the pelvis through a complex procedure which will control erection.
Erectile dysfunction is labeled if it is difficult to get and maintain erection regularly for several occasions. As the erection is a very complex procedure which has many different phenomenons’s involved so there can be fault in any of the part of the procedure.
It may be secondary to various medical conditions like cardiovascular diseases, diabetes, neurological diseases like trauma due to prostatectomy surgery, hormonal imbalance and due to various side effects from the medications.
So one should keep in mind that the erectile dysfunction can be due to some underlying disease which could be dangerous like heart diseases and might need urgent attention.
Impotence can be due to lack of feelings or due to some problems in relationship. This type of the impotence can be termed as psychological impotence as the erection fails to occur due to some psychological reasons.
It has been proved that more than 90% of men will suffer from the erectile dysfunction at some or other stage of their life but at few occasions only. If the erection fails to occur or hold multiple times or in succession than the condition may be due to erectile dysfunction.
If the cause of impotence is psychological then placebo medication will have a dramatic effect on the condition. Most of the men will be benefited with the use of placebo. Some patients are advised PDE5 inhibitor drugs like sildenafil or Viagra while in some cases. Intravenous, intracavernous and intraurethral drugs can also be injected.