The corpus cavernosum, also known as the corpus cavernosum muscle, is the hardest smooth muscle and connective tissue in the body. The corpus cavernosum is a structure unique to the male reproductive system and an erectile tissue, which is primarily a spongy scaffolding made up of connective tissue and smooth muscle. The corpus cavernosum is located on the left and right sides of the dorsal side of the penis, and is a cone with two pointed ends that can expand and contract on its own. When expansion of the corpus cavernosum occurs due to blood congestion, the penis thickens and hardens and naturally erects, which facilitates sexual intercourse. If the blood in the corpus cavernosum decreases, the penis becomes weak. Therefore, the corpus cavernosum is more important for the human body, mainly for male sexual function. If the spongy body is damaged, it may trigger erectile dysfunction, impotence and premature ejaculation. Patients are advised to pay attention to protection in daily life to avoid damage to the spongy body and erectile dysfunction. If uncomfortable symptoms occur, you should go to the hospital in time to consult the doctor for treatment.