Erectile Dysfunction: Causes, Diagnosis, and Treatment

Erectile dysfunction (ED) is the consistent or intermittent inability to achieve or sustain an erection sufficient for satisfactory sexual activity. A useful evaluation separates ED from related problems, takes a full history, and looks for medical and psychological contributors before choosing treatment.

The sexual response cycle

Masters and Johnson described desire, arousal, orgasm, and resolution. ED is chiefly an arousal-phase problem, but impaired erections can also reduce sexual interest and make orgasm harder to achieve. See the sexual response cycle and ED.

Separating ED from related conditions

Men often confuse Peyronie’s disease, changes in desire, or orgasmic difficulty with ED. Mapping symptoms onto the sexual response cycle helps tell them apart and points treatment in the right direction. Peyronie’s disease, for example, involves curvature or deformity from plaque; that is a different problem from inability to firm or keep an erection, even when both are present. See Peyronie’s disease.

Starting the conversation

Many men find sexual concerns hard to raise. Clinicians can open the topic directly, especially when risk factors or other urologic symptoms are already on the table.

History and context

A full history covers onset, severity, and the situations in which symptoms occur. Morning or nocturnal erections, when present, can suggest a stronger psychogenic contribution and warrant further exploration. Whether symptoms are stable or worsening helps identify progressive comorbidities.

The partner’s perspective

When a partner is willing to take part, their account of relationship duration, dynamics, and sexual concerns often clarifies what treatment needs to address. Including the partner in discussion and decision-making is useful when both want that.

Physical examination

Exam findings that matter for ED workup include obesity measures such as waist circumference and genital assessment for deformity or plaque. A digital rectal examination is not required for every ED evaluation, but it can be useful when lower urinary tract symptoms or benign prostatic hyperplasia are also under consideration.

Laboratory tests

Common labs include morning total testosterone and glucose (or related metabolic markers). Results help identify hormonal and metabolic contributors and conditions that need treatment in their own right. The AUA guideline addresses testosterone testing as part of the ED evaluation; see testosterone and erectile dysfunction.

Psychological factors

Depression, anxiety, and relationship strain can contribute to onset and persistence of ED. Addressing them alongside physical findings improves outcomes. Referral to a mental-health or sexual-medicine clinician is appropriate when those factors are prominent.

Validated questionnaires can quantify severity and track response to treatment; see validated questionnaires for ED.

If you have questions about anything in this article, write to us at hello@xialla.com. We read and answer every message.