There is no clear authoritative data to show how hard the penis erection is considered normal, usually the hardness of the male penis erection can complete a more satisfactory sex life, and there is no other physical discomfort, are normal phenomena. Due to the physical condition of men, as well as personal physical differences, the hardness of the penis erection is also different, it is not possible to specify how hard the penis erection is considered normal. However, if a man’s penis can be erected normally, and the hardness can support him to complete a satisfactory sex life, and there is no weakness after insertion into the vagina, or weakness before ejaculation, it is a normal hardness, and there is no need to worry. However, if a man has difficulty in inserting the penis during intercourse, cannot insert the penis into the vagina at all, or cannot maintain sufficient erection hardness although he can have an erection, resulting in weakness after insertion into the vagina, etc., it is necessary to consider that the penis is abnormally hard, and need to consult a doctor in a timely manner. Once diagnosed with sexual dysfunction, you should actively cooperate with the doctor to take relevant treatment measures, so as not to delay the condition.