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Erectile dysfunction (ED) or (male) impotence is a sexual dysfunction characterized by the inability to develop or maintain an erection of the penis topic. Chinese erection pills There are various underlying causes, such as cardiovascular leakage and diabetes, many of which are medically treatable topic. Chinese erection pills The causes of erectile dysfunction may be physiological or psychological topic. Chinese erection pills Physiologically, erection is a hydraulic mechanism based upon blood entering and being retained in the penis, and there are various ways in which this can be impeded, most of which are amenable to treatment topic. Chinese erection pills Psychological impotence is where erection or penetration fails due to thoughts or feelings (psychological reasons) rather than physical impossibility; this can often be helped topic. Chinese erection pills Notably in psychological impotence there is a very strong placebo effect topic. Chinese erection pills Erectile dysfunction, tied closely as it is to cultural notions of potency, success and masculinity, can have devastating psychological consequences including feelings of shame, loss or inadequacy; often unnecessary since in most cases the matter can be helped topic. Chinese erection pills There is a strong culture of silence and inability to discuss the matter topic. Chinese erection pills In fact around 1 in 10 men will experience recurring impotence problems at some point in their lives topic. Chinese erection pills Folk remedies have long been advocated, with some being advertised widely since the 1930s topic. Chinese erection pills The introduction of the first pharmacologically approved remedy for impotence, sildenafil (trade name Viagra), in the 1990s caused a wave of public attention, propelled in part by heavy advertising topic. Chinese erection pills The Latin term impotentia coeundi describes simple inability to insert the penis into the vagina topic. Chinese erection pills It is now mostly replaced by more precise terms topic. Chinese erection pills The study of erectile dysfunction within medicine is covered by andrology, a sub-field within urology topic. Chinese erection pills Overview and symptoms Erectile dysfunction is characterized by the regular or repeated inability to obtain or maintain an erection topic. Chinese erection pills There are several ways that erectile dysfunction is analyzed