Lift but not firm, firm but not soon refers to erectile dysfunction. There are many factors that can cause erectile dysfunction, including disease, age, psychological stress, home conditions, and sexual partnerships. For young adult men, it is usually caused by psychological factors. Typical symptoms of erectile dysfunction are the inability of the penis to get an erection or the ability to get an erection but it is not hard. It can also be complicated by decreased libido, anxiety, nervousness, low self-esteem, ejaculation disorder, premature ejaculation and other conditions. In terms of medication, sildenafil, vardenafil, tadalafil, avanafil and other phosphodiesterase type 5 inhibitors are available. Some patients can choose surgical treatment, including penile prosthesis implantation and so on. The above drugs need to be used under the guidance of professional physicians. In daily life, it is necessary to insist on physical exercise, reasonable diet, regular sexual life, weight control, quit smoking and so on. For the underlying diseases should also be treated, including diabetes, hyperlipidemia, depression, cardiovascular and cerebrovascular diseases, lung diseases and so on. For erectile dysfunction caused by psychological factors, psychological counseling is needed, which is conducive to the recovery of sexual function.