Causes of erectile dysfunction are numerous. In the past, it was commonly referred to as an organic and psychogenic erectile dysfunction, while today we know that, in most cases, it is about the combined effect of physical changes and psychic factors (which are more commonly held by ED than its cause).

The immediate cause of erection is the inflow of larger amounts of blood in corpse corpus and corpus spongiosum penis due to the parasympathetically-induced increased release of nitrogen oxide from the local endothelial blood vessel. Venous emptying of said structures is complicated by the compression of the ergotate tissue, but also by the pressure of some pelvic muscles (such as m. Ischiocavernosus and m bulbospongiosus). With the loss of parasympathetic stimulation, erectile dysfunction occurs. In addition to the mentioned neurogenic and vascular factors, normal erectile dysfunction are important both psychologically and hormonal and iso glucogenic factors.

Of the physical causes of ED, it should be noted that diabetes mellitus (which, with its complications on blood vessels and nerves, especially autonomic, can lead to vascular or neurogenic erectile dysfunction), diseases and spinal cord injuries (it is extremely important to estimate the height of the damage as it may have meaning for the advice we will give to the patient, since those with a lower erectile center can have solid erections with the proper stimulation of the sexes while not having erections on visual stimuli or imagination), endocrine disorders (eg hypogonadism, hyperprolactinemia). We must not forget neither the effect of drugs.

Various antihypertensive drugs, endocrine system medications, analgesics, antipsychotics, antidepressants, and many others may have a negative effect on erection. Psychological factors may be causal (eg, depression and anxiety disorder, particularly panic disorder, have significantly increased ED frequency) or maintaining (anxiety about performance and fear of failure repeat in erection maintenance is the most important ED maintenance factor even when organic state improves). Cultural factors can have meaning in some men (eg. the misinterpretation that a man should have a strong erection as soon as he sees a handsome woman, that the erection intensity during the relationship does not change or take into account physiological changes occurring with aging, eg slower erection, greater significance of physical stimulation) and is most important to give them correct information.

Three Causes of Erectile Dysfunction

The causes can be divided into three groups:

  1. Organic – as a complication of another disease
  2. Psychogenic – Psychogenic Problems
  3. Mixed – a combination of organic and psychogenic causes


  • gradual emergence, except for injury
  • constant dysfunction
  • absence of night / morning erection
  • men older than 60 years risk
  • factors for ED present
  • orgasm and ejaculation function preserved

Read more about Causes of Organic Erectile Dysfunction >


  • Severe outbreak without injury
  • Relational problems
  • Ordinary night / morning erection
  • Men under the age of 60 without presence of risk factors
  • Possible disorder of orgasm or ejaculation

In most cases (80%), causes are mixed etiology with dominance of the organic component. Between 35% and 50% of men with diabetes suffer from ED, others with chronic illnesses are very similar to the results (kidney disease, chronic alcoholism, multiple sclerosis, atherosclerosis and other vascular diseases). Difference in symptoms of ED depending on the cause of occurrence.