Mycoplasma igg positive there is a certain possibility of infection. First of all, igg is also known as igG. Mycoplasma IgG positivity indicates the presence of immune antibodies in the body that can protect against invasive mycoplasma infections. In addition to IgG, there is also an immune marker for recent infection and IgM, which indicates the presence of a recent mycoplasma infection. Therefore, when there is only IgG in the body without IgM, it means that the body has been infected with Mycoplasma and is not infectious in the near future. However, when there is both IgG and IgM and certain clinical symptoms, it is necessary to consider that there is a tendency to be infected in the near future, and there is a certain degree of contagiousness. Because there are many types of mycoplasma, including Mycoplasma pneumoniae, Mycoplasma genitalium, Mycoplasma hominis, Mycoplasma fermentans, Mycoplasma penetrans, and so on, the pathway of infection is more complicated. Including respiratory transmission also includes sexual contact transmission, so with patients need to pay extra attention to the process, to avoid unscientific protection caused by the spread of disease, inducing unnecessary health losses.