With more blood flowing in and less flowing out, the Penis enlarges, resulting in an erection. The good news is that ED can be treated and is not something you have to learn to live with. Impotence is more common than you think. If you can identify the cause, this condition can be successfully treated, so allowing normal sexual function to return of its own accord. Never have their been so many books, magazines and shelves full of grooming products designed to help men stay in peek physical condition. That's nearly 30 million men in America alone. It's up there with the likes of Nike, Coca-Cola, Pepsi and Microsoft as one of the world's most instantly recognisable brands. Then we'll take a look at the possible causes of ED and various self-help treatments that may negate your need to use the drug in the first place. there are many herbal products on the market that have been proven over the years to both stimulate sexual desire and/or improve your ability to get an erection. Very often it's another medical condition, possibly one you don't even know you have, that is causing ED. NO in turn activates an enzyme called Guanylate Cyclase

    Digital Urology Journal: Impotence
    Impotence can be a total inability to achieve erection, an inconsistent ability stress, anxiety, guilt, depression, low self-esteem, and fear of sexual failure.

    MedlinePlus Medical Encyclopedia: Erection problems
    Male infertility is also quite different from impotence. provider if your erection problems are related to fear of recurring heart

    Erection problems
    provider if your erection problems are related to fear of recurring heart Permanent impotence or other lasting damage to your penis may result from