Erectile dysfunction: understand the cause, then treat it.

Erectile dysfunction (ED) is the persistent or recurrent inability to achieve or maintain an erection sufficient for satisfactory sexual performance. Occasional difficulty is normal and not clinically significant; ED is diagnosed when symptoms persist for three months or longer, or when they begin to affect quality of life or relationships.

Prevalence rises sharply with age. Studies suggest more than half of men over 40 experience some degree of ED,¹ with rates increasing in each subsequent decade. The condition is also strongly correlated with cardiovascular risk factors, diabetes, hormonal imbalance, and certain medications - which is why it should be evaluated as a clinical signal of broader health rather than dismissed as a standalone concern.

ED is highly treatable. Most patients respond well to first-line treatments, and root-cause management often produces sustained improvement that goes beyond the immediate symptom. Confidential, evidence-based evaluation is the right starting point - not waiting and not self-medicating with unverified online sources.

ED rarely has a single cause. Most cases involve a combination of vascular, hormonal, metabolic, neurological, psychological, and medication-related factors. Understanding the dominant cause is the foundation of effective treatment.

Vascular causes are the most common in men over 50. Atherosclerosis, hypertension, and endothelial dysfunction reduce vascular capacity and are often the underlying mechanism. ED frequently precedes diagnosed heart screening by 3-5 years,² making it an important early signal warranting heart screening.

Hormonal causes primarily involve testosterone deficiency. When total testosterone falls below clinical thresholds (typically <12 nmol/L on two morning samples), correction often improves both desire and erectile function - but TRT is only initiated after confirmed diagnosis.

Metabolic causes centre on diabetes and insulin resistance. Diabetic neuropathy and vasculopathy together make ED 2-3 times more common in diabetic men. Diabetes care is part of every Hisential ED workup.

Psychological causes - stress, anxiety, depression, performance anxiety, and relationship factors - are particularly common in men under 40 with otherwise healthy cardiovascular and metabolic profiles.

Medication-induced ED is common with certain antihypertensives (especially beta-blockers and thiazide diuretics), SSRIs, antipsychotics, and finasteride. Where suspected, alternative medications are often available - never stop prescribed medication without clinical guidance.

Less obvious contributors include venous leak, where blood drains from the penis faster than it can be retained, untreated obstructive sleep apnoea, thyroid disorders, raised prolactin, and nerve damage from pelvic surgery, spinal injury or long-standing diabetes. These are less common than vascular causes but they change the treatment plan when present, which is why the workup looks for them rather than assuming.

Co-occurring conditions worth evaluating alongside ED include premature ejaculation treatment, enlarged prostate, and comprehensive health screening.

Most men have a mix of both, but the pattern of symptoms usually points to which side dominates. This is one of the first things we work through in consultation.

The ladder below is how the main options compare in practice. Most men start at the top and add to it rather than replacing it.

A minority of men do not respond to first-line care, usually where nerve or blood vessel damage is extensive. Further options exist: vacuum erection devices, injectable therapy given directly into the penis, and surgically placed penile implants for men who have exhausted everything else.

These are not part of the service list at our Orchard clinic. Where they become the right next step, we discuss them honestly and refer you to a urologist who provides them.

An erection is a vascular event, so anything that improves blood vessel health improves erectile function. That is why the best-supported natural approaches are unglamorous rather than exotic.

Strong evidence: aerobic exercise, roughly forty minutes at moderate to vigorous intensity four times a week, sustained for six months or more; weight loss in men carrying excess visceral fat; stopping smoking; treating poor sleep and untreated obstructive sleep apnoea; reducing heavy alcohol intake; a Mediterranean-style eating pattern; and pelvic floor training, which has randomised trial support particularly where erections fade quickly.

Limited evidence: a small group of supplements, including nitric oxide precursors, ginseng preparations and correction of genuine vitamin D or zinc deficiency, has plausible mechanisms and some small-trial support. Effects are far smaller than prescribed treatment, and supplementing where you are not deficient does nothing. Discuss any supplement with your doctor first, especially if you take blood pressure medication.

A safety warning worth taking seriously: health authorities in Singapore and across the region regularly find sexual performance products adulterated with undeclared prescription medicines, sometimes at doses well above therapeutic range. A hidden ingredient can be fatal in combination with nitrate medication prescribed for angina, and dangerous in men with unstable heart disease. If a supplement produces a strong, rapid, drug-like effect, treat that as a reason for suspicion rather than reassurance.

The relationship runs both ways. Stress, low mood and anxiety reduce arousal and interfere with the nerve signalling an erection depends on. Erectile difficulty then damages confidence and mood, which makes the next occasion harder. That loop is what most men actually present with, whatever started it.

Performance anxiety is the clearest version: one difficult episode becomes anticipation of another, attention shifts to monitoring yourself rather than the experience, and the sympathetic response that anxiety produces works directly against the relaxation an erection requires.

Psychological factors are more likely to dominate in younger men with healthy cardiovascular and metabolic profiles, where onset was sudden, situational, and morning erections are preserved. Some prescribed medications for low mood also affect sexual function, which is worth raising rather than stopping treatment on your own.

We address this alongside physical treatment rather than instead of it. Restoring reliable function often breaks the anxiety cycle by itself, while the underlying vascular, hormonal and metabolic work continues in parallel.

Start with assessment rather than a product. Bloods, cardiovascular risk and a proper history tell you which lever is worth pulling, and they are the difference between treating ED once and treating it forever.

For most men, first-line oral medication is the sensible opening move while the rest of the plan takes effect. Vascular-dominant cases are the ones best suited to shockwave therapy. Where testosterone deficiency is confirmed on two morning samples, that is treated on its own track with monitoring. Lifestyle and metabolic work runs in parallel throughout, because it is the part that keeps the gains.