Erectile dysfunction is the difficulty or inability to achieve or maintain a penile erection resulting in a successful sexual intercourse. It is also known as impotence, but now it has stopped using the term in the medical field. It affects many men and increases with age, but to consider an alteration is necessary to manifest 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 an index of high cholesterol, smoking, diabetes or who have been treated with radiotherapy. Neurological disorders (Alzheimer's, for example) and hormonal (by utilizing medication) are given a lesser extent. There may also be a cause of affective: patients with severe forms of depression or anxiety often have erectile dysfunction. The treatments besides medication, usually include changes in lifestyle, such as quitting smoking and exercising regularly.