Essentially, the examination is comprised of assessing the physical status of your genitalia and excluding any obvious conditions that may be contributing to your dysfunction. The doctor should also look for any cardiovascular irregularities that may be implicated as a contributing factor to your condition and also might put you at risk with certain treatments, especially if Viagra is to be prescribed.
The penis should also be checked for pre-existing scar tissue (Peyrone's disease) which produces a bend in the penis when it becomes erect. It will feel like a hard nodule or defined flattened area of hardened tissue. The testicles should be examined for two reasons:
•  to exclude any suspicious masses there
•  to determine whether or not the testes have diminished in size and consistency.

Although not a mandatory part of the examination, a rectal examination is a very useful procedure to exclude the presence of prostate cancer. Injection of a vasodilator compound into the penis may also be used by the doctor to assist with an ultrasound examination. This injection will also help the doctor gauge the best dose for the patient if this form of treatment proves necessary.
Blood tests should also be taken if your doctor suspects a medical condition may have caused your erection failure. The following tests may also reveal co-existing medical conditions which can contribute to erectile dysfunction:

•  glucose levels may point to diabetes
•  liver function tests are advised if there is a suspicion of a drug or alcohol problem
•  cholesterol tests are advised if there is a suspicion of vascular disease
•  testosterone level tests are advised if your condition is associated with a low libido
•  Prostate Specific Antigen (PSA) tests may be necessary to exclude the presence of prostate cancer.

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