Mycoplasmas are microorganisms that are intermediate between viruses and bacteria and do not have a cell wall. The main mycoplasmas associated with human diseases are Mycoplasma pneumoniae, Mycoplasma solium, Mycoplasma humanum and Mycoplasma genitalium. Positive mycoplasma suggests the presence of mycoplasma infection in humans, mainly in the following cases: 1, respiratory tract infection: Mycoplasma pneumoniae infection may cause mycoplasma pneumoniae, mainly through respiratory transmission, Mycoplasma pneumoniae is often present in the respiratory tract mucosa, mycoplasma secreted toxins can lead to respiratory tract, lung damage, and even cardiovascular damage in severe cases, inspection can be seen positive mycoplasma; 2, genitourinary tract infection. Impure sex is prone to mycoplasma infections in the genitourinary tract, which can cause urethritis, prostatitis, etc., with positive mycoplasma performance; 3, obstetric tract infections: if the mother suffers from urinary tract infections, or mycoplasma in the genitourinary tract, newborns delivered through the genital tract may develop mycoplasma infections and positive mycoplasma performance. In addition, public bathrooms, swimming pools do not do a good job of sanitation and disinfection, people and the environment in contact with mycoplasma, prone to mycoplasma urinary tract infection, the examination can appear mycoplasma positive.