If you feel a decline in sexual function and do not know if you are suffering from ED, which is commonly known as impotence, you can use the currently popular international diagnostic scale (IIEF-5) to self-test, the total score of the following table corresponds to the disease: 5-7 is severe ED, 8-11 is moderate ED, 12 -21 is mild ED, 22-25 is not suffering from ED (normal), if the score is less than 21 points should be treated. I hope that you can make an objective evaluation for yourself against the above table, so that you can have a correct understanding of your erectile function. If problems are found, they can be treated in time. International Erectile Function Rating Questionnaire (IIEF-5) How confident are you in getting and maintaining an erection in the past 3 months: 0 1 2 3 4 5 1. Very low Low Low Moderate High Very high 2 After sexual stimulation, how many times was the penis able to enter the vagina firmly No sexual activity Almost never or not at all Few times (far less than 1/2) Sometimes (about 1/2) Most of the time (far more than 1/2) Almost always or always 3 After sexual penetration, how many times was the penis able to maintain an erection No sexual intercourse attempted Almost never or not at all Few times (far less than 1/2) Sometimes (about 1/2) 4 How difficult is it to maintain an erection during intercourse until the end of intercourse? 5 How often did you feel satisfied during sexual intercourse? No sexual intercourse was attempted.