Several tests can be used to evaluate the causes and extent of male sexual problems. They include:
Blood tests. These tests may be done to check hormone levels and to check for diabetes, high cholesterol and other risk factors.
Vascular assessment. This involves an evaluation of the blood flow to the penis. A blockage in a blood vessel supplying blood to the penis may be contributing to erectile dysfunction.
Sensory testing. Particularly useful in evaluating the effects of diabetic neuropathy (nerve damage), sensory testing measures the strength of nerve impulses in a particular area of the body.
Nocturnal penile tumescence and rigidity testing. This test is used to monitor erections that occur naturally during sleep. This test can help determine if a man's erectile problems are due to physical or psychological causes.