Male diseases in a narrow sense refer to diseases that occur in the male genitourinary system. There are more types of diseases included, such as sexual dysfunction, circumcision, prepuce, premature ejaculation, prostatitis, epididymitis, prostatic hyperplasia, varicocele, penile cancer, testicular cancer, syringomyelia, glansitis, seminal vesiculitis, orchitis, impotence, cryptorchidism, azoospermia, frigidity and a series of other diseases. Male diseases are diseases that men have and are divided into four main types depending on their effects on the male body. The first category is those affecting male sexual dysfunction, which mainly includes impotence, premature ejaculation, painful ejaculation, lack of libido, circumcision, prepuce and other diseases. The second aspect is male reproductive dysfunction, which is mainly manifested in the inability to conceive or sperm abnormalities, azoospermia and other diseases of this type. The third category is diseases of the male reproductive organs, such as prostate enlargement, epididymitis, seminal vesiculitis, orchitis, etc. all belong to this category. Another type is due to diseases of the hypothalamus or pituitary gland that cause endocrine disorders in men, such as Kalman syndrome, frigidity and other diseases. The causes of male diseases are many, mainly related to the usual habits, sexual lifestyle, living environment, etc. Men should strengthen physical exercise in daily life, ban smoking and alcohol, ensure sufficient sleep, do not engage in high-risk sexual behavior.