Syphilis is a chronic sexually transmitted disease (STD) caused by the spirochete syphilis, which is very harmful and can not only affect the skin, mucous membranes and other tissues and organs. Syphilis is a sexually transmitted disease that spreads quickly, is harmful, and directly affects the fertility of the patient, which makes some newlyweds with syphilis very afraid. Syphilis causes male infertility for the following reasons: Syphilis is a sexually transmitted disease, mainly through the way of unclean sex to spread the disease harmful to human health. When infected with syphilis, the genital area of the human body will be attacked by syphilis spirochetes, which will seriously affect people’s reproductive health. Over time, it will affect the quality of sexual life and happiness, decreased libido, or syphilis spirochetes induced urinary infections, will eventually affect male fertility, and then untreated, will lead to male infertility. In serious cases, it may also threaten life safety. If you do not receive timely treatment in a regular hospital to quickly and effectively prevent the harm of syphilis, it will inevitably affect male fertility. First of all, the pain and inner suffering brought about by the disease can easily cause male sexual dysfunction. If the virus reaches the internal reproductive organs through the blood circulation of the whole body, it will also trigger prostatitis, seminal vesiculitis, orchitis, etc. The inflammatory lesions caused by these organs can directly affect the number and vitality of sperm, or lead to sperm deformities, which will directly cause male infertility. Through the above and said we understand some of the knowledge of syphilis, know the harm of syphilis, syphilis treatment is not timely will lead to infertility, so we have to pay more attention to their own body in their daily lives, it is best to put an end to perjury, so as not to accidentally suffer from sexually transmitted diseases, bring pain to themselves and their families.