What Are the Physical Causes of Impotence?

Physical impotence occurs when there is a problem with any of the systems needed to get or maintain an erection. The good news is that potency can usually be restored when a man is treated for underlying medical conditions, when medications are adjusted or when lifestyle habits are changed.

Here are some of the top causes of impotence:
Vascular Disease. Hardening of the arteries can affect the artery leading to the penis so that it cannot dilate enough to deliver all the blood necessary for an erection. Impotence can also occur if the nerves that control blood flow to the penis are damaged.

Diabetes. One out of every four impotent men has diabetes, which can cause nerve deterioration (diabetic neuropathy). Impotence may result if nerves or blood vessels that control the flow of blood to the penis are affected. In some cases, keeping the diet and blood sugar under control can decrease impotence. But permanent nerve damage can result in a chronic problem.

Disease of the Nervous System. Some conditions, such as multiple sclerosis, Parkinson's disease and spinal cord injuries, can affect or cause impotence.

Cancer Surgery. Surgery to remove cancer from the prostate, bladder, colon or rectal area can cause impotence if the nerves and blood vessels that control erections are damaged in the process of removing cancerous tissue.

Medications. Some prescription medications for high blood pressure, depression, spinal cord injury, diabetes and other conditions can cause temporary impotence by interfering with the nerve impulses or blood flow to the penis. Doctors may be able to adjust the dosage of a drug or change the medication to reverse or minimize the problem.

Smoking. A recent study at the New England Research Institute in Watertown, Massachusetts, found that impotence was equally common among smokers and non-smokers in general. However, among men with certain health problems, those who smoked were much more likely to have potency problems. For example, 56 percent of smokers with heart disease were completely impotent compared with only 21 percent of non-smokers with the disease.

Alcoholism. Excessive alcohol consumption disrupts hormone levels and can lead to nerve damage. This type of impotence may be reversible or permanent depending on the severity of the nerve damage. Some clinical studies suggest about 25 percent of all alcoholics become impotent -- even after they stop drinking.

Hormone Imbalance. Abnormal testosterone levels are rare, but they can cause impotence. In addition, other illnesses, such as kidney failure and liver disease, can disrupt the balance of hormones.

What Are the Psychological Causes of Impotence?
A man who is depressed, under stress, or worried about his "performance" during sex may not be able to have an erection. Qualified therapists or counselors who specialize in the treatment of sexual problems can often help diagnose and sort through these problems. Some impotence problems can be solved when a man understands the normal changes of aging and how to adapt to them. For example, as men get older they generally need more direct stimulation to achieve an erection. They may also have less firm erections, take longer to ejaculate and need more time between erections.

Relationship woes can interfere with potency and so can job stress, depression or financial worries. Impotence may also be the result of deep-seated emotional trauma, such as having been sexually abused as a child. Qualified psychotherapists can diagnose such problems and help men understand and overcome them.