The Erectile Dysfunction Workup a Good Doctor Actually Does

What tests are done for erectile dysfunction?

An erectile dysfunction evaluation is mostly conversation and a few well-chosen labs, not a battery of procedures. It typically has four parts: a detailed history of the problem, a focused physical exam, a short symptom questionnaire, and blood tests aimed at the common underlying causes — hormonal, metabolic, and vascular. Imaging such as a penile ultrasound is reserved for specific situations, not done routinely.

Erectile dysfunction is common, and it is not a normal or inevitable part of aging 1Ref 1National Institute of Diabetes and Digestive and Kidney Diseases (NIH) (2017).Definition & Facts for Erectile Dysfunction.The definition of erectile dysfunction, that an estimated 30-50 million U.S. men have it, and that it is not a normal or inevitable part of aging.. That framing matters for the workup: because ED is usually a symptom of something else rather than a standalone problem, a good evaluation is built to find that something else.

An estimated 30 to 50 million men in the United States have erectile dysfunction, and it is not an inevitable part of aging 1Ref 1National Institute of Diabetes and Digestive and Kidney Diseases (NIH) (2017).Definition & Facts for Erectile Dysfunction.The definition of erectile dysfunction, that an estimated 30-50 million U.S. men have it, and that it is not a normal or inevitable part of aging..

The history is the most revealing test

The single most useful part of the workup is the history, because it points to the cause faster than any lab. A clinician asks how the problem started — a gradual decline over months often suggests a physical, vascular cause, while a sudden onset tied to a stressful event or a new relationship can point toward a psychological one. This is the heart of sorting physical vs psychological ED, and the two often coexist.

Erectile dysfunction can stem from problems with blood vessels, nerves, or hormones, and also from certain medicines, mood and stress, and lifestyle behaviors 2Ref 2National Institute of Diabetes and Digestive and Kidney Diseases (NIH) (2017).Symptoms & Causes of Erectile Dysfunction.That ED can be caused by conditions affecting blood vessels, nerves, or hormones, as well as by certain medicines, psychological factors, and lifestyle behaviors, which is why the workup checks hormonal, metabolic, and vascular causes.. So the history covers a lot: whether morning erections still happen, what you take — since some medications that cause ED are common and reversible — how you have been sleeping and drinking, and how your mood and relationship are. Each answer steers which tests are worth running.

The questionnaire: SHIM and IIEF

Most workups include a short, structured questionnaire — commonly the Sexual Health Inventory for Men (SHIM), a five-question version of the longer International Index of Erectile Function (IIEF). It asks about confidence, firmness, and how often erections are maintained during sex, and turns those answers into a score. The score does two jobs: it gauges how severe the problem is at the start, and it gives a baseline to measure whether treatment is helping.

The SHIM (Sexual Health Inventory for Men) is a brief, five-item questionnaire clinicians use to gauge the severity of erectile dysfunction and to track change over time.

A structured questionnaire is also a check against guessing. It captures the details people find hard to volunteer and makes follow-up comparisons meaningful. It is a genuine clinical instrument, which is part of why a careful in-person evaluation looks different from a form that asks one or two questions and moves straight to a prescription.

The labs a careful workup checks — and why each one

Because erectile dysfunction so often reflects a hormonal, metabolic, or vascular problem 2Ref 2National Institute of Diabetes and Digestive and Kidney Diseases (NIH) (2017).Symptoms & Causes of Erectile Dysfunction.That ED can be caused by conditions affecting blood vessels, nerves, or hormones, as well as by certain medicines, psychological factors, and lifestyle behaviors, which is why the workup checks hormonal, metabolic, and vascular causes., the blood tests are chosen to look for exactly those. A short, targeted panel usually includes:

• A morning testosterone, drawn early in the day when levels are highest, to check for low testosterone as a contributor. A single low or borderline result is usually repeated before anyone acts on it — which is where the difference between genuine low t vs TRT marketing matters, since a number alone is not a diagnosis.
• A measure of blood sugar, such as A1c or fasting glucose, because diabetes is one of the most common and most under-recognized causes; the link between diabetes and ED is strong, and ED can be the first noticeable sign.
• A lipid panel, because the same cholesterol and blood-vessel problems that affect the heart also affect the small arteries involved in an erection 2Ref 2National Institute of Diabetes and Digestive and Kidney Diseases (NIH) (2017).Symptoms & Causes of Erectile Dysfunction.That ED can be caused by conditions affecting blood vessels, nerves, or hormones, as well as by certain medicines, psychological factors, and lifestyle behaviors, which is why the workup checks hormonal, metabolic, and vascular causes..

Depending on the history, a clinician may add thyroid tests or a prolactin level. The panel is deliberately small: each test maps to a cause worth ruling in or out, rather than a fishing expedition.

Why erectile dysfunction can be an early warning from your heart

One reason the labs lean toward blood sugar and cholesterol is that erectile dysfunction and cardiovascular disease share the same underlying problem: endothelial dysfunction, in which the lining of blood vessels stops working properly 3Ref 3Gandaglia G, Briganti A, Jackson G, et al. (2014).A systematic review of the association between erectile dysfunction and cardiovascular disease.That erectile dysfunction and cardiovascular disease share endothelial dysfunction as a common mechanism, that ED often precedes cardiovascular disease, and that ED can serve as an early marker of increased cardiovascular risk.. Because the arteries supplying the penis are smaller than the coronary arteries, they often show trouble first — which means ED can precede a heart attack or stroke by years and act as an early marker of cardiovascular risk 3Ref 3Gandaglia G, Briganti A, Jackson G, et al. (2014).A systematic review of the association between erectile dysfunction and cardiovascular disease.That erectile dysfunction and cardiovascular disease share endothelial dysfunction as a common mechanism, that ED often precedes cardiovascular disease, and that ED can serve as an early marker of increased cardiovascular risk..

Erectile dysfunction can be an early sign of cardiovascular disease, sometimes appearing years before a heart problem does 3Ref 3Gandaglia G, Briganti A, Jackson G, et al. (2014).A systematic review of the association between erectile dysfunction and cardiovascular disease.That erectile dysfunction and cardiovascular disease share endothelial dysfunction as a common mechanism, that ED often precedes cardiovascular disease, and that ED can serve as an early marker of increased cardiovascular risk..

That is why a workup worth its name does not stop at the erection. Taking erectile dysfunction cardiovascular risk seriously — the reason clinicians ask about chest pain, check blood pressure, and review heart risk factors — can turn a frustrating symptom into an early, useful warning. The connection between ED and clogged arteries is one of the strongest arguments for a real evaluation rather than a quick online script.

When an ultrasound or specialist test is warranted

Most people never need imaging. A penile duplex ultrasound — which uses sound waves to measure blood flow into and out of the penis, usually after a medication is given to produce an erection — is reserved for specific situations: younger men with ED and no obvious risk factors, a history of pelvic or genital trauma, a poor response to first-line treatment, or when a vascular or surgical cause is suspected. It is a specialist test, typically ordered by a urologist.

Other specialized tests exist for narrow questions — for example, nocturnal studies that check whether erections occur during sleep, which can help separate a physical from a psychological cause. What none of this looks like is a two-question intake form. Compared with many online ED services, a full evaluation trades speed for the thing that actually matters: knowing why, so the treatment fits the cause and nothing dangerous is missed.