Sexuality is the cornerstone of racial reproduction and a unique way for men and women to communicate their feelings and enjoy life, while sexual dysfunction will cause a series of emotional, life and social problems. Erectile dysfunction, the most common type of sexual dysfunction, is abbreviated as “ED”, which has various names in the society such as “sexual impotence”, “impotence”, “phallic inactivity”, etc. “It is a common form of sexual dysfunction. This is a topic that we all keep to ourselves, hoping to understand, but ashamed to talk about it. Erectile dysfunction (ED) is defined as the persistent (for at least 6 months) inability of the penis to achieve and/or maintain sufficient erectile hardness for satisfactory sexual intercourse.ED is the most common sexual dysfunction in men, and it is closely related to people’s physical and mental health and has a significant impact on the quality of life of both the patient and his family. ED is a common disease in middle-aged and older men. 1994 in Massachusetts, the United States on 1709 men aged 40-70 years of sexual function survey found that the incidence of ED in men aged 40-70 years was as high as 52%, from 50 to 70 years of age, the complete loss of erectile function rose from 5.1% to 15%, in the 70-year-old age group only 33% of people retain the ability to erect. 1998 in China A similar survey was conducted in 1998 in China, targeting 1,582 urban men over the age of 40, and found that as many as 73% had problems with erectile function. In other words, only 1/3 of men over 40 years old in China have completely normal erectile function. There are many factors that affect men’s erectile capacity, the main one being age, which gradually decreases with age. The most important factor is age, as the erectile capacity decreases with age. many diseases such as cardiovascular disease, diabetes, obesity, hyperlipidemia, neurological diseases, genitourinary diseases, etc. can lead to a decrease in erectile capacity and eventually ED. some trauma such as spinal cord, pelvic trauma, surgery such as rectal, prostate surgery may also have a “fatal” blow to male sexual function. In the modern, competitive society, psychological factors are leading to a younger onset of ED. In addition, poor lifestyle, such as long-term smoking, alcohol, overwork, may also be slowly “eaten” by the male erectile function. To understand ED we must first understand how the penis is erected. The erection of the penis is a complex and coordinated series of physiological processes that produce a series of neurovascular activities in men when they have sexual vision, touch, and even sexual fantasy. The degree of erection depends on the balance between the amount of blood flowing into the arteries and the amount of blood flowing out of the veins in the penis. When the arterial inflow is low and balanced with the venous outflow, the penis is in a flaccid state, i.e. not erect; while when the arterial inflow increases and the venous outflow decreases, the penis expands and hardens due to the increased blood content, i.e. in an erect state. Normal men produce spontaneous erections at night during sleep, called nocturnal erection, which is a physiological phenomenon that provides nutrition to the tissues of the penis and prevents penile atrophy. The nocturnal erection can roughly reflect the erectile function. The various factors mentioned above are what produce ED by affecting nerve activity and/or changes in blood flow in the penis. Men with ED often show that the penis cannot get an erection when there is sexual stimulation, or the erection is not hard enough to insert into the vagina of the woman, or it is soft soon after insertion into the vagina, and cannot complete sex, resulting in the woman not being satisfied, while the man often feels guilty, worried, and afraid. In the long run, even affect the relationship between the two sides, resulting in a breakup or divorce. Sexuality is a barometer of male health, the appearance of ED not only affects the quality of life of both spouses, but also reflects the male body and mind may have problems, and therefore requires the joint attention of men and their spouses. In the past, the diagnosis of ED was only inferred by the doctor based on the patient’s complaints, but nowadays there are many specialized erectile function tests such as psycho-psychological evaluation form, sexual function evaluation form, nocturnal erection test, blood hormone test, neurological and vascular examination, etc., which can distinguish psychological ED from organic ED and diagnose which cause of ED. Possible risk factors need to be actively corrected before targeted treatment of ED, such as treatment of medical conditions, smoking cessation, alcohol cessation, physical exercise, and removal of psychosomatic factors, which will make ED treatment more effective. ED is treated with behavioral therapy, medication, vacuum negative pressure devices, intracavernosal injections and surgery, and treatment options need to be selected according to the patient’s condition, i.e. individualization of treatment options. Both men and women need to learn something about sexual techniques, which is especially important for people who have never had sex before. Some people who go to the doctor simply because of a lack of knowledge of sexual intercourse failure, a little guidance to them can be effective. Medication is the primary treatment for patients with all types of ED. The most commonly used drugs are selective type 5 phosphodiesterase inhibitors (PDE-5 inhibitors), which are fast-acting and effective, and are the drugs of choice for treating ED. The representative drug is the United States Pfizer Viagra, which is commonly referred to as “Viagra”. It acts on a key link in the erection process – type 5 phosphodiesterase to help erection, increase the hardness of the erection and prolong the erection time, so as to better complete sex life. However, many people in the community talk about Viagra, and there are many different opinions, such as “addictive”, “dependence”, “treating the symptoms but not the root cause “The most important thing is that it is not a good idea to take it. The men must break these misconceptions and establish a correct understanding when they know about Viagra. Viagra can successfully cure psychological ED, and also has a significant therapeutic effect on various organic ED. International and domestic male experts generally believe that type 5 phosphodiesterase inhibitors such as cialis, viagra, etc., can improve male erectile function, the efficiency of about 80%, and long-term safety and effectiveness. However, elderly people and men with heart disease need to use them under medical supervision. Patients who do not have access to oral medication or do not have the conditions to use medication can choose the method of vacuum negative pressure device or intracavernosal injection of vasoactive drugs, but the use of caution, there are certain risks, must be under the guidance of a doctor. Surgical treatment may be an option when conservative treatment is not effective. Erectile dysfunction is a common problem that plagues men, and many men may encounter it. Knowledge about erectile function and ED is needed to identify ED and seek appropriate treatment later in life.