Erectile dysfunction is the difficulty or inability to achieve or maintain a penile erection that will result in a successful sexual intercourse. It is also known as impotence, but this term is not used in the medical field anymore. It affects many men and increases with age, but to consider it an alteration, it is necessary that it happens persistently. The most common causes of erectile dysfunction can be both physical and psychological, or a combination of both. They can be of vascular type: men with high cholesterol, smoking, diabetes or who have been treated with radiotherapy. Neurological disorders (Alzheimer’s, for example) and hormonal (by utilising medication) in a lesser extent. There may also be effective causes: patients with severe depression or anxiety often have erectile dysfunction. The treatments besides medication, usually include changes in lifestyle, such as quitting smoking and exercising regularly.