A hard erection and soft glans is a completely normal physiological phenomenon, which is designed to protect a woman’s vagina during intercourse. Penile erection refers to the process in which the male penis is stimulated, the blood vessels are dilated, and blood rapidly fills the cavernous body of the penis, eventually leading to a penis that holds up, hardens and grows longer. An erect penis can be inserted more freely into a woman’s vagina for sexual intercourse. It is a completely normal physiological phenomenon that the penis is usually erect and hard and the glans is soft, this is for the protection of the woman’s vagina during coitus. Common erection-related disorders include erectile dysfunction and abnormal erection. Men can improve their erections by practicing good habits, relieving psychological burdens, developing a good physique, and having a regular sex life. Hard penis and soft glans patients need to maintain a good state of mind, and to cooperate with the treatment of the attending physician, follow the doctor’s instructions and reasonable use of medication.