Hard packs grow down there for different reasons due to gender differences. Men can be caused by diseases such as penile sclerosis, penile tumors, and condyloma acuminatum, while women can be caused by diseases such as vulvar tumors, chancre, and vestibular adenocysts. 1. Male (1) Penile sclerosis: it often occurs after inflammatory injury and may appear as a localized hard knot with a hard texture. (2) Penile tumor: often located on the glans and prepuce, with a cauliflower-like surface, which may be accompanied by secretions, or pain and bleeding. (3) Condyloma acuminatum: located in the coronal groove and on the foreskin, the surface is cauliflower-like, can be multiple episodes, with a history of unclean sexual intercourse. 2. Female (1) Vulvar tumors: female vulvar tumors generally refer to tumors of the skin, mucous membranes, glands, and connective tissues of the pubic mound, labia, clitoris, and vestibule in women. (2) Hard chancre: it is mainly manifested in the female genital area showing small red spots, rising and forming hard lumps on the surface of the skin. (3) Vestibular cysts, which are formed when inflammation of the vulva or vagina blocks the opening of the gland ducts of the vestibular gland, usually with no obvious symptoms. There may be other reasons for the hardness of the genitals, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.