First, anesthesia and certain male surgery can also lead to male infertility, within six months for surgical procedures to receive general anesthesia, have received testicular sectioning surgery, these will temporarily inhibit the ability of the testes to produce spermatozoa. Patients who have had prostatectomies and bladder neck surgeries for obstruction can sometimes cause retrograde ejaculation resulting in azoospermia. Hypospadias or suprapubic urethral tears can sometimes cause difficulty in ejaculation after reconstructive surgery. Surgery for hernia can sometimes cause obstruction of the vas deferens. Vasectomy or removal surgery can cause the development of anti-spermatozoa antibodies, and these make vasectomy reattachment surgery less beneficial. If semen quality does not improve after successful varicocele surgery, other causes of infertility should be identified. Narrowing of the urethra due to trauma can also cause failure to ejaculate semen. Repeated urinary tract infections can also cause male infertility. Infections of the prostate gland can harm the reproductive organs, thus affecting the quality of semen. Sexually transmitted diseases (STDs), such as syphilis, gonorrhea, herpes simplex virus and human papillomavirus infections, can cause male infertility. And herpes virus and human papillomavirus infection will reduce the mobility of sperm. Thirdly, some bad habits can also lead to male infertility. Working in high temperature environment for a long time, driving for a long time or washing three warmth often will cause the testicles to decrease the ability to crack sperm. Long-term exposure to some heavy metal substances, such as lead, cadmium, mercury, or pesticides, herbicides, carbonate-containing sulfide, will reduce fertility. Fourth, diabetes and certain neurological disorders can cause a decrease in spermatozoa production and thus trigger male infertility. Tuberculosis can cause parotitis and prostatitis, which in turn cause male infertility, chronic sinusitis, chronic bronchitis and fine bronchodilatation, all of which can cause spermatozoa incompetence or cystic fibrosis of the tissues. Mumps after puberty can sometimes cause orchitis, so that the testicles lose the ability to produce sperm, and then male infertility. Fifth, long-term heavy smoking and alcohol consumption can cause sperm quality to decline. Smoking marijuana and heroin can also affect male fertility. High body temperature can also cause male infertility, body temperature over 38.5 ℃, a body temperature of more than 38.5 ℃, will inhibit the manufacture of sperm up to six months, and high body temperature will change the DNA of sperm. Sixth, some drugs will cause a temporary or permanent reduction of sperm and thus lead to male infertility, such as male hormones, female hormones, steroids and other drugs for the treatment of urinary tract infections, treatment of gout Drugs such as colchicine and ulcerative colitis drugs can cause a temporary decrease in sperm count. Some chemical drugs used in the treatment of cancer can also contribute to male infertility.