Injury to the nerves and arteries near the penis can lead to erectile dysfunction. According to the National Institutes of Diabetes and Digestive and Kidney Diseases, surgeries for prostate and bladder cancer can injure penile nerves and arteries, although it doesn't always happen. Spinal cord injuries can affect the ability to achieve and maintain an erection, as can injuries to the penis, prostate, bladder and pelvis.
A dating death sentence: How men perceive their ED issues also changes with age. With older men, "they've had a life of good erections to look back on," Rose Hartzell, Ph.D., EdS, an AASECT-certified sex therapist with San Diego Sexual Medicine, told Mic. But with some younger men who haven't had much opportunity to be sexually active, "they might feel cheated" out of having a good sex life.

A very stressful or intense situation, or performance anxiety, could definitely make a man lose his erection. The pressure to perform could be psychologically too intense to keep a strong one. Another, lesser talked about erection killer is difficulty penetrating a partner during sex. It’s related to performance anxiety and stress, but also fatigue. If sex becomes tiring, fatigue will bring a quick end to an otherwise great night.

Does nitric oxide help sexually?


There is no evidence that mild or even moderate alcohol consumption is bad for erectile function, says Ira Sharlip, MD, a urology professor at the University of California San Francisco School of Medicine. But chronic heavy drinking can cause liver damage, nerve damage, and other conditions -- such as interfering with the normal balance of male sex hormone levels -- that can lead to ED.
If you’re a guy over 40, there’s a fifty-fifty chance that you have a problem getting or keeping an erection. Now, I don’t mean the sort of erection you saw in American Pie! I mean an erection that’s firm enough and long-lasting enough for sexual satisfaction. Every guy has times when he just can’t manage an erection. Still, if you’re having trouble achieving a satisfying erection more than 50% of the time, you’ve got erectile dysfunction (ED).
Irrespective of how stage one was achieved, the next part is all about your plumbing. Courtesy of your nervous system stimulus, a powerful blood vessel dilator, nitric oxide, is released into the trabecular arteries and smooth muscle in your penis. This causes the arteries and the main bulkhead of your penis, the corpora cavernosa, to become engorged with blood. Helpfully, to keep this blood in place and maintain your erection, the ischiocavernosus and bulbospongiosus muscles of your penis constrict, effectively blocking the veins of your penis from draining blood out.

Many times men, both young and old, have problems maintaining an erection in their relationships. Many men are embarrassed when this occurs, however, it is more common than many think. There are different degrees of erectile dysfunction, some are due to physiological problems and others occur because of psychological problems. However, there are common features in erection problems. The main issue is when their partners begin to believe that the fault is theirs, when in reality this is not the case. If your partner is experiencing erectile dysfunction problems, in this oneHOWTO article we will discuss how to help a man maintain an erection.
Erectile dysfunction, often referred to as ED, is characterized by a persistent and recurring inability to achieve or maintain an erection sufficient for sexual intercourse. Psychological, physical and lifestyle issues can all cause ED, as can trauma to nerves and arteries. The incidence of erectile dysfunction increases with age, but young men can also experience it.
Most men may not openly talk about their erection problems, but erectile dysfunction — when a man cannot achieve or maintain an erection well enough or long enough to have satisfying sex — is very common. According to the National Institutes of Health, 5 percent of 40-year-olds and 15 to 25 percent of 65-years old have ED. But while ED is more likely to occur as a man gets older, it doesn’t come automatically with age.

Though few things are worse for your erection than a cigarette habit, coffee can actually help you out below the belt. A study by the University of Texas Health Science Center at Houston found that men who consumed the caffeine equivalent of 2-3 cups of coffee per day were less likely to suffer from erectile dysfunction than those who preferred to wake up with caffeine-free beverages.
The most common diagnostic test for erectile dysfunction is called penile ultrasound. This test uses sound waves to look for abnormal penile blood supply. Another test that may be done is nocturnal penile tumescence testing, in which a type of computer is attached to the penis to see if nighttime erections are occurring. If a young man is having nighttime erections but can’t get an erection during sex, a psychological cause becomes more likely.

The answers to these questions, as well as physiological tests like an ultrasound or neurological assessment, can help determine the root cause of ED. Depending on the cause, different treatment options are available. Treatments range from medication, to hormone replacement therapy, to vascular surgery, to sex therapy and/or couples counseling. It sounds like you have ruled out many physical factors, in which case it may be useful to consider psychological factors. Often, couples counseling and/or sex therapy (as a couple or individual) can identify factors related to ED, help with communication, and improve sex for both partners. For a sex therapist, check out the American Association of Sexuality Educators, Counselors, and Therapists (AASECT) web site and click on the "Locate a Professional" link.
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Regular exercise and a diet rich in antioxidants is also the foundation of permanent weight control and diabetes prevention. Studies at the Duke University Diet and Fitness Center show that weight loss is strongly associated with better sexual function. Other studies show that diabetes is a major risk factor for ED, and that a healthy lifestyle prevents the disease and can restore erection function.

"Erectile dysfunction medication interferes with the process that allows blood to leave the penis," adds Reitano. "Men with erectile dysfunction would benefit from having the chemicals leading to the erection outweigh the actions of the chemicals that cause the penis to lose its firmness, to have the systems that cause the inflow outweigh the chemicals that cause the outflow."


The American Medical Association (AMA) estimates that more than 30 million men in the US experience ED. And they expect that number to double by 2025, largely due to the fact that erectile dysfunction is affecting more and more guys in their 20’s and 30’s. ED in your 20’s is becoming more common, and that can signal some serious health risks to a growing number of young men.
So not only are erectile problems common, they're nothing for you or your special friend to be freaked out about. Check out the nine most common reasons that dudes sometimes can't get it up, and get ready to become the soothing voice of reason the next time the guy you're with has a hard time pitching his tent in your happy valley. Everything (and every penis) is gonna be fine! 

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