Erectile Dysfunction, which is customarily called “impotence” by our common people, is known as Erectile Dysfunction, or ED for short, which is now widely known to people. What is ED? It refers to the past three months, the penis can not be erect or have an erection, but can not maintain sufficient erection to complete sexual intercourse. Clinically, there are a considerable number of patients, no sexual life, self-perception of poor erectile function, which can not diagnose impotence. It should be noted that impotence it is both an independent disease, but also can be a symptom in other diseases, especially the latter, need to pay extra attention to the doctor and the patient, but also why impotence patients come to the clinic, we have to carry out the examination of one of the reasons. Studies have shown that ED can be the first symptom of hypertension, hyperlipidemia, diabetes, and can be a sign of the progression of cardiovascular disease. So we should have a new understanding of ED. So what can cause ED? Generally speaking, the causes are divided into psychological, organic and mixed. 1, psychological ED: is caused by anxiety, tension, depression and inferiority complex and other adverse psychological factors. Etiological factors include: lack of sex education, wrong sex education, mental trauma, uncoordinated husband-wife relationship, uncoordinated social and interpersonal relationship, inappropriate sexual life occasions, and medical factors. Psychological factors can lead to impotence, impotence will aggravate the psychological burden, thus forming a vicious circle. 2.Organic ED: It refers to ED caused by organic lesions, the cause of which can be found through clinical testing. It can be further categorized into neurological, vascular, endocrine, and cavernous lesions leading to. Common causes include: systemic diseases (coronary heart disease, hypertension, diabetes, etc.), as well as some chronic diseases (thyroid disease, severe liver disease and kidney disease); trauma and surgery (trauma or surgery of the brain, medulla oblongata, pelvis, penis); pharmacological factors (such as antihypertensive drugs, psychotropic drugs, etc.). With the progress of testing methods, more and more patients with organic impotence are diagnosed. 3, mixed posterior ED: the presence of both psychological and organic factors, this type is currently the most common in the clinic, usually organic ED is accompanied by certain psychological disorders. What are the risk factors for impotence? 1, age: with age, the erectile function of the penis is decreasing super trend year by year. In the twenties and thirties, the penis does not need too much stimulation, can quickly erect, and can quickly start the second erection after orgasm. By the age of forty or fifty, penile erection requires a longer period of stimulation and caressing, and it is difficult to have a second erection after orgasm, or at long intervals. After the age of sixty, the penis is less likely to become erect, or if it does, there is some difficulty in maintaining an erection. After the age of seventy, most men lose their sex life, and a small number of men can have an erection for sex after stimulation, but often do not reach orgasm. 2, bad habits: smoking, alcoholism, drug abuse, work pressure and so on. Foreign animal experiments have confirmed that smoking can cause testicular interstitial cell and support cell damage, resulting in lower blood androgen levels, while smoking caused by penile cavernous smooth muscle NOS activity is reduced and the number of cavernous smooth muscle and structural changes, manifested as a significant increase in collagen fibers, cavernous sinus vascular lumen has obvious changes. 3, living conditions: divorce, living alone, emotional disharmony and so on. Long-term one person, no sex life, can lead to men’s erectile function decline, lack of sexual confidence, resulting in ED. some studies show that relative to infrequent sexual behavior of men, at least 1 time a week sexual behavior of older men will have less than half the risk of ED. However, men who have sex once a week don’t have to be complacent. More sex means less risk of ED, and men who have sex at least three times a week have only a quarter of the risk of erectile dysfunction compared to men who have sex less than once a week. “With in and out of the waste” to describe it more aptly. 4, medical factors: penile trauma, prostate cancer after radical surgery. 5, drugs: the treatment of cardiovascular disease drugs, hormones, psychotropic drugs. 6, Diseases: cardiovascular disease, diabetes, abnormal lipid metabolism, chronic hepatic and renal insufficiency, depression and so on.