Conditional pathogenic bacteria have a certain severity when the flora of the organism is dysbiotic. Normal flora maintains a good survival balance through nutritional competition, mutual constraints of metabolites and other factors. Under certain conditions the balance is broken, the original non-pathogenic bacteria in the normal flora can become pathogenic, this type of bacteria is called opportunistic pathogens, also known as conditional pathogens. Conditional pathogenic bacteria are normal microorganisms that live in the organism, and under normal circumstances, the bacterial population is maintained in a balanced state and will not develop disease. When the equilibrium of the conditionally pathogenic bacteria is disrupted, they may further develop into pathogenic bacteria. Or when the bacterial colony is out of balance, the original normal bacterial colony gradually develops into a dominant, thus becoming pathogenic, sometimes the body’s immune function is low, the normal bacterial colony enters into the tissues or the bloodstream diffusion and thus infected with pathogenic bacteria. Therefore, when the balance of conditionally pathogenic bacteria is broken, it is possible for them to become pathogenic bacteria and harm the human body. It is recommended that if there is any abnormality, you should go to the hospital in time, and actively cooperate with the physician under the guidance of doing relevant examinations and treatments, so as not to delay the condition.